2.1 Synchronic DOM in Romanian

In present-day Romanian, DOs may appear either without any overt case marking, as in (5a), or marked with the preposition pe (5b–c). In addition, in many cases, DOs are also doubled by a weak clitic pronoun, as in (5c). The preposition pe also has additional usages as a locative preposition, as exemplified in (6), and further discussed in section 2.3.

The exact generalizations covering the distribution of DOM are complicated by a range of exceptions, which appear to be orthogonal to our article. However, the main tendencies seem very clear: only [+human] and at least [+specific] DOs can be marked with pe. Pronouns and proper names are always marked with pe. Definite DPs that are not weak in the sense of Carlson et al. (Reference Carlson, Sussman, Klein, Tanenhaus, Davis, Deal and Zabbal2006) are always marked with pe unless in possessor raising constructions (see Onea and Hole Reference Onea and Hole2017). Indefinites are marked with pe if they are specific (see Farkas Reference Farkas1978 and subsequent research). We will not enter into a more detailed synchronic description here.

There is, however, one significant synchronic observation that we will later need: the preposition pe preserves syntactic features typical of prepositions in Romanian even when clearly acting as a DO marker (Mardale Reference Mardale2009, Hill and Mardale Reference Hill and Mardale2019). We illustrate this in (7). In Romanian, definite DPs are generally marked by the enclitic definite article as in (7a) irrespective of the syntactic role of the DP (Dobrovie-Sorin and Giurgea Reference Dobrovie-Sorin and Giurgea2006). However, if the definite DP contains only a noun without any modifiers and the DP is headed by a preposition (except the prepositions cu ‘with’ and de-a ‘as’), the definite article cannot be overt, as shown in (7b). This phenomenon is known as article drop (Dobrovie-Sorin Reference Dobrovie-Sorin, Alboiu, Avram, Avram and Isac2007, Mardale Reference Mardale, de Saint-Pierre and Thibeault2008, Onea and Hole Reference Onea and Hole2017). Crucially, this phenomenon, otherwise limited to prepositions, also applies to clear cases of DOs marked with pe, hence showing that at least some prepositional features of the differential object marker pe are preserved.

From this observation one could conclude that pe as a DO marker did not undergo a profound diachronic change with regard to its original locative prepositional variant. Instead, one could conjecture that pe may have been able to maintain its prepositional status because the process of becoming an object marker was neither abrupt nor did it involve any radical step of (syntactic) reanalysis. This, in turn, suggests that a search for the diachronic source of DOM in Romanian should naturally begin with the very semantics of pe as a locative preposition.

2.2 Diachronic Data

Given the fact that we do not have a large amount of written material from Romanian before the 16^th century, the history of DOM in Romanian cannot be fully reconstructed on solid empirical grounds. The diachronic spreading of DOM since the 16^th century has been, however, fairly well documented (von Heusinger and Onea Reference von Heusinger and Onea2008; Stark Reference Stark2011; Hill Reference Hill2013; Mardale Reference Mardale and Hill2015; Avram and Zafiu Reference Avram, Zafiu and Dragomirescu2017; Hill and Mardale Reference Hill and Mardale2017, Reference Hill and Mardale2019, and others). In particular, it seems that in the 16^th century, DOM is attested mainly with proper names and pronouns, and is beginning to spread to definite DPs. Later, especially in the 19^th and 20^th century, DOM spreads towards (specific) indefinite DPs. This diachronic process appears to be very similar to the one described by von Heusinger and Kaiser (Reference von Heusinger, Kaiser, Heusinger, Kaiser and Stark2005) and von Heusinger (Reference von Heusinger2008) for Spanish.

The data we consider for this article are the oldest original texts in Romanian, the Documente şi însemnări româneşti [Romanian Documents and Notes], 1521–1625, (edited by Chivu et al. Reference Chivu, Georgescu, Ioniţă, Mareș and Roman-Moraru1979) To provide a brief overview of the diachronic situation reflected by this particular datasetFootnote ⁶, we have manually annotated the first 400 uncontroversial DOs expressed as DPs (including quantificational and negative phrases as well as personal and relative pronouns, but not including clitic pronouns) for referential categories, pe-marking and animacy.Footnote ⁷ Our annotation did not include cases in which the argument structure of the verb was not clear, but this in no case led to ignoring an argument marked by pe. Hence, the proportion of unmarked DOs may be higher than reflected by the data we report further below. Notice that more detailed reports on the distribution of DOM and clitic pronouns in Old Romanian (partly based on the same corpus) are given in Mardale (Reference Mardale and Hill2015) and Hill and Mardale (Reference Hill and Mardale2017, Reference Hill and Mardale2019). Our report here is limited to our manually annotated data.

We found only one instance of pe-marking for non-human DOs : an instance of a country-name, provided in (8). It is not entirely obvious whether this example can be treated as an error (since in all other cases country names as DOs were not used with pe), or whether some variation existed as to whether countries could in certain cases be treated as [+human] (e.g., in a metonymic sense).

In Table 1, we report the results of our annotation for human DOs. The data widely confirm older observations by von Heusinger and Onea (Reference von Heusinger and Onea2008) from a corpus of Bible translations: in general, pe-marking was fairly obligatory with personal pronouns and obligatory with proper names while it was optional with definite descriptions and very uncommon or even ungrammatical with indefinites and other types of expressions.

Table 1: Pe-marking for human DOs in Old Romanian (absolute numbers)

We provide an example of pe-marked proper names and definite descriptions in (9) and of pe-marked personal pronouns in (10). The only example of a non pe-marked proper name in our data is the one given in (11). While we have annotated the expression Dumnezeu (‘God’) as a proper name, because it was generally both marked with pe and written with a capital initial letter, it is by no means clear that it was always considered a proper name in common usage.Footnote ⁹ Moreover, the example immediately continues with a Slavonic passage, which may also suggest that there might be grammatical contamination due to code switching. Hence, we cannot consider (11) a sufficient reason to dismiss the generalization that pe-marking was obligatory with proper names in Old Romanian.

Table 1 also suggests that clitic doubling with pe-marked DOs was not very common in Old Romanian, at least before 1600. Clitic doubling was only common when the DO was a stressed personal pronoun, and quite rare with proper names and definite descriptions. In fact, all instances in which a co-referential clitic pronoun occurred with a proper name or with a definite description were cases of clitic-left-dislocation, as in (12) (see also Escandell-Vidal Reference Escandell-Vidal2009 and Iemmolo Reference Iemmolo2010 for similar observations about early Catalan and Hill and Mardale Reference Hill and Mardale2017, Reference Hill and Mardale2019 about early Romanian).

3.1 Other usages of the preposition pe in Old Romanian

Alongside its usage as a DO marker, pe, as shown above, most commonly appears as a locative preposition with a considerable range of locative functions. These are exemplified in (13).

It is not the goal of this article to provide a sensible spatial-semantic analysis of the meaning of pe in Old Romanian by providing a spatial model, for example in the sense of Jackendoff (Reference Jackendoff1990) or Kracht (Reference Kracht2002). Part of the difficulty would be that there may have been significant speaker variation within the data, and there also seems to be some amount of polysemy. For example, (13a) appears to introduce a goal/place function, whereas the examples in (13c) and (13d) appear to introduce the path of some movement. Such patterns would pose a challenge even in a synchronic setting, where we could rely on speaker intuitions to delimit the range of possible readings.

Moreover, there is a range of usages in different conceptual domains that appear to be closely related to the basic locative reading, some of which are exemplified in (14).

Some of these readings can be reconstructed either within the framework of conceptual metaphors (Lakoff and Johnson Reference Lakoff and Johnson1980) or within some more elaborate localist theories of semantic roles (e.g., Ostler Reference Ostler1979). For example, one could at least imagine that (14b) involves a goal specification within some transactional domain, or that (14c) would involve a conceptualization of the legal basis of judiciary decisions as the grounds of judgments, that is, the place on which these judgments stand. That these readings are closely connected to the core locative meaning of pe (‘on’) is evidenced also by the fact that we find these readings in distantly related languages for the corresponding preposition. For example, while English on cannot be used in (14b) with the verb pay, the expression spend money on something implies that on can be used in English to express what we glossed as ‘in exchange for’. Similarly, the German preposition auf (‘on’) can express the conventional meaning captured by (14d) in the construction auf dass (‘with the aim of’).

Upon closer inspection, there is a wide variety of usages of pe in Old Romanian that appear to be connected to the reading in (14b), but which extends beyond the domain of money and spending, covering a reading ranging between for, concerning, and about, that English on also shares in certain contexts. We provide a few examples in (15) and English examples in (16):

These readings are interesting for two reasons. Firstly, it is not obvious how exactly such readings could be connected to the spatial meaning of pe. But at the same time, such a connection probably exists at some cognitive level – be it a conceptual or a metaphorical level – because different languages tend to exhibit the same or similar patterns. Secondly, these readings are no longer readily expressed with pe in modern Romanian. The usual defaults include despre (‘about’) (17a), used entirely differently in Old Romanian and asupra (‘concerning’) (17b). Crucially, using pe in such constructions is not always entirely out in modern Romanian, but examples get better and less archaic in cases in which the argument of pe is [-animate] and thus could not be a pe-marked DO, as, for example, in (17c) and (17d). Hence, it looks like pe has at least partially lost some of its usages transitioning from Old Romanian to present-day Romanian.

On the one hand, these readings may not be the best places to look for a source of grammaticalization of pe as a DO marker because they do not seem to be obviously connected to expressions which have high values for animacy or definiteness. But on the other hand, the fact that some of these readings have been lost in modern Romanian seems to be a good indication that they may have been at least impacted by the evolution of DOM.

3.2 Argument alternation and grammaticalization

With a limited set of verbs, the abstract readings suggested above come in interesting pairs. Such pairsFootnote ¹⁰ are exemplified in (18) and (19).

Two important facts are remarkable about these data. Firstly, they can be schematically represented as in (20), revealing that the pe-marked arguments must have a different argument structure in each of the constructions. The representation in (20a) suggests that the verb can be transitive, because of the presence of the reflexive pronoun, but the pe-marked DP cannot be the DO, so it must be a PP. The one in (20b), however, lacks anything that would count as a DO except for the pe-marked DP. Hence, under the assumption that the verb is transitive after all, the pe-marked DP would have to be analyzed as the DO, and the PP as missing (either no longer part of the argument structure, or not overtly realized.)

The second important fact is that the distribution of this phenomenon is generally limited to verbs that involve propositional or even utterance content, including verbs of bargaining and economic transactions, which involve performative components. Interestingly, each of the two syntactic constructions above lead to different English translations of the respective verbs, while remaining within the same conceptual domain: complain vs. mourn and haggle vs. hire.

Hence, one may try to understand this phenomenon as an argument alternation, in the sense of Rappaport and Levin (Reference Rappaport-Hovav and Levin2008) and others. Levin (Reference Levin2015) provides a number of properties that should hold for argument alternations. For example, there should be a significant meaning overlap between the two variants. Most, if not all, of the same semantic arguments ought to be expressed in both variants. The same pattern of alternation can be more or less exactly reproduced for other, similar, verbs. Prima facies, our examples do not seem to fit directly into this pattern. For example, the fact that the English translations differ should cast doubt on the semantic similarity. Moreover, it is not exactly the same arguments that are expressed in each variant. And finally, we have little evidence that the patterns could in fact be reproduced with other, similar, verbs.

Given the scope of this article, it will not be crucial for us to make the claim that these are bona fide argument alternations; but we suggest that they are at least very close to argument alternations. Firstly, we do not know (given the data situation) whether by fixing all the mismatches between the examples in order to create minimal pairs, we would or would not obtain very similar meanings. We will argue in section 5.2. that this is at least plausible. For now, it should at least be observed that hiring appears to be the result of a haggling process, and mourning and complaining differ mainly in what could be deemed the cause or occasion (some bad event for complaining; death for mourning). Secondly, the fact that the verbs are translated differently into English is unsurprising, given that argument alternations do have semantic impact and languages may differ in containing verbs that express both feature bundles associated with an alternation (see Levin Reference Levin2008). For example, the contrast between buy and sell or borrow and lend has been analyzed as an argument alternation in Puyuma (see Teng Reference Teng2008, Kuo Reference Kuo2015). Put differently: if in English the same argument alternation does not exist, it would not be surprising that we get different lexical translations. Moreover, the type of verbs in question do lend themselves to argument alternations, as demonstrated by the English mourn, which can either occur as a plain transitive verb or take a PP argument, as shown in (21).

(21)

1. a. When the founding father of the Republic of China died, some mourned him while others condemned him.

2. b. When Uriah's wife heard that her husband was dead, she mourned for him.

In the same vein, such alternations are still available in modern Romanian with certain verbs. However, they only involve pe in one variant. Consider the case of the verb a plânge (‘to cry’) as shown in (22). At least in modern Romanian, it is beyond doubt that (22b) is a transitive construction, as demonstrated by its ability to passivize shown in (23). At the same time, in (22a) de Ion cannot be a DO, sine the construction is reflexive.

Moreover, while we cannot say how common such alternations may have been in Old Romanian, we will show in section 5.2. that the analysis of the two pairs is at least quite similar.

Thus, we will call these argument alternations, acknowledging that the choice of terminology is based on circumstantial evidence. Our analysis will focus more on the question of how these alternations may have arisen than on the questions of whether they are actually bona fide argument alternations and how they can be analysed as such.

With this in mind, the fact that in the Old Romanian constructions in (18) and (19), the same verb can appear with pe in two different syntactic structures, one of them being prepositional and the other a DO, naturally suggests that such constructions may have facilitated the transition of pe from a preposition to a DO marker. But how could this have actually taken place?

Suppose that originally, what we have now identified as a DO variant was not a DO variant at all; that instead, we had a verb with two arguments (apart from the subject). As shown in (24a), there could be a DO argument (as far as we know reflexive and co-indexed with the subject) and a PP argument. Alternatively, the first argument could also be omitted, thus creating a structure as in (24b), in which Arg2 is still a PP. Finally, the second argument is-reanalyzed as the DO, without changing its overt form, as in (24c). The only difference is that now, in (24c), pe is no longer heading a PP but marking the DO.

One could object to our hypothetical explanation, however, pointing out that it is not obvious why Arg2:PP would ever be re-analyzed as Arg1:zero from a semantic perspective. Turning to our example, this objection amounts to the following question: How could the role played by the agent in complaining possibly be attributed to the role of the dead person? But then again, if we could convincingly argue that, in fact, in (24b) Arg2 is co-indexed with Arg1, the objection would no longer constitute a problem, as the re-analysis would be – in this case – a very natural step. After all, being the same individual is the best possible reason for reanalysis.

This is precisely what we will eventually suggest, even though the analysis will turn out to be a bit more complex. In order to be able to suggest such an analysis, we need to achieve a deeper understanding of the role played by the PP in these constructions. This is the goal of the following section.

4.1 Existing accounts

Consider the example in (3) (structurally similar to examples from Moulton Reference Moulton2009), repeated for convenience as (25), as a starting point of our discussion. The question we are interested in is what the semantic contribution of about may be, in this example.

1. (25) Steve complained about Donald_i that he_i works too little.

According to Moulton (Reference Moulton2009) and related research, one may assume that the verb to complain in English is a so-called content-verb, that is, it may take a content-argument. A content is simply propositional content, such as an embedded question or proposition, the story in a book, the image in a picture, etc.Footnote ¹¹ This is quite similar to the older, more or less standard, analysis of such verbs as taking propositional theme-arguments, with the notable advantage that it leads to natural predictions concerning the distribution of that-argument-clauses: since not every verb (or nominal) has a content, not every verb may take a propositional argument. For (25), then, the proposition that Donald works too little modifies the content-argument of the verb complain, hence yielding the correct result: that the content of the complaint made by Steve is that Donald works too little. As for the semantic import of the preposition about in such sentencesFootnote ¹², Moulton (Reference Moulton2009) suggests that it introduces a different argument he calls the res argument, reminiscent of Quine (Reference Quine1956) or Cresswell and von Stechow (Reference Cresswell and von Stechow1982). Moulton is not very explicit about what a res is, except that it gives a natural account of de re readings associated with about arguments.

Rawlins (Reference Rawlins and Snider2013) further elaborates on the meaning of about arguments, focusing mainly on the distribution of possible internal arguments of about. These are particularly interesting for a compositional semantic analysis because they include embedded questions as in (26b), and DPs as in (26a), which arguably have different semantic types.

1. (26)

   1. a. John asked about Joanna.

   2. b. John asked about whether Joanna was going.

The strategy adopted by Rawlins is to take the question-embedding case as the standard, basic case. He suggests that when the internal argument of about is a DP, a question needs to be extracted from that DP. When it comes to the truth conditional import of about, the intuition in Rawlins (Reference Rawlins and Snider2013) is roughly this: a question A can be about a question B if at least some resolution of A helps in resolving B. For (26a), that would suggest that the question actually asked by John was such that it would help resolving some other question constructed from some salient property of Joanna. For (26b), in the same vein, the content of the speech act performed by John was helpful in determining whether Joanna was going or not. Given that Rawlins uses a version of Inquisitive Semantics (see Groenendijk and Roelofsen Reference Groenendijk, Roelofsen, Larrazabal and Zubeldia2009, Ciardelli et al. Reference Ciardelli, Groenendijk and Roelofsen2013, Ciardelli et al. Reference Ciardelli, Groenendijk and Roelofsen2018) underlying his type-logic, he can extend this analysis also to examples like (25). The reason for this is that questions (i.e., sets of sets of worlds) and propositions in the classical sense (i.e., sets of worlds), have the same semantic type in Inquisitive Semantics, namely sets of sets of worlds, and, thus, share some properties. That-clauses and questions are both propositions in Inquisitive semantics.

At least at an intuitive level, it seems to us that the analysis of about-arguments as introducing a different semantic role than content appears to be correct. However, when it comes to the technicalities, we are skeptical about the analysis outlined in Rawlins (Reference Rawlins and Snider2013). Rawlins uses a symmetrical implementation of what it means for a question to be about another question using a notion of orthogonality from Lewis (Reference Lewis1988).Footnote ¹³ Essentially, for a question to be non-orthogonal to another question, it will suffice if one partition cell, in the sense of Groenendijk and Stokhof (Reference Groenendijk and Stokhof1984), does not overlap. This predicts truth conditions that are too weak. For example, this would predict that Dan could report the situation in (27a) by uttering (27b). After all, the salient question about Peter is given in the context of (27b), and this question is clearly not orthogonal to the question of whether Alfred and Berta slept well – at least given reasonable assumptions about parties disturbing neighbors. Intuitively, John did not ask anything about Peter in the described situation, regardless of whether any question about Peter's properties/actions – orthogonal or not to his question – may be relevant in context. One obvious reason for this is that John does not even know that Peter exists; hence, John cannot be involved in speech acts about Peter.

1. (27)

   1. a. Situation: John asked whether Alfred and Berta slept well. John does not know anything about Peter. Alfred and Berta are the people living underneath Peter's apartment.

   2. b. Dan: I was wondering whether Peter had a party last night. I am not sure, but I recently found out that John asked about Peter.

Similarly, it is not obvious why one would attempt to unify the polymorphic nature of about and its internal arguments to a basic, propositional case, as opposed to a DP-denotation. It is not obvious that examples like the ones provided in (28) require any kind of context and allow any non-trivial coercion of DP-arguments of about to questions. Yet these examples are prototypical for the usage of about in English.

1. (28)

   1. a. I read a book about Paris.

   2. b. So happy to meet you, Mr. Peterson. I heard about you on a radio talk show.

   3. c. A book about bats usually contains pictures of bats.

4.2 About embedded topics

Given these difficulties, we will slightly modify Rawlins’ approach in this section. While we agree with both Moulton (Reference Moulton2009) and Rawlins (Reference Rawlins and Snider2013) that about introduces a semantic argument of the verb, we will assume that it is neither a question nor a res-argument, even though, arguably, what we say could in fact be compatible with Moulton's analysis.

Instead, we suggest that the way in which a complaint by Steve is about Donald in (25) is not very different from the way in which utterances like those in (29) are about Donald. In other words, for (25), we suggest that (on the most natural interpretation) about Donald suggests that Steve made a statement in which Donald was the aboutness-topic (Reinhart Reference Reinhart1981) and whose content was that he works too little. In other words, if Steve made an utterance like any of those in (29), (25) is true.

1. (29)

   1. a. Steve: Donald, he really works too little.

   2. b. Steve: Donald works too little.

   3. c. Steve: As for Donald, he should work more.

Before turning to additional details, there are several intuitive arguments supporting this analysis. For one thing, if one were to imagine a list of complaints, say in court archives, one could well imagine that complaints are ordered as file-cards. A complaint about Donald would then be a complaint whose file-card is entitled “Donald”. This is – of course – quite exactly the intuition captured in the theory of topicality put forth by Reinhart (Reference Reinhart1981). In other words, our approach essentially just captures the meta-language usage of aboutness-topic as a theoretical notion. Moreover, one can also imagine that if X is the topic of a complaint, the complaint, as a discourse segment in the sense of Asher and Lascarides (Reference Asher and Lascarides2003), would have precisely X as a discourse topic in the sense of Asher (Reference Asher2004) (see also Roberts Reference Roberts, Maienborn, von Heusinger and Portner2011). Moreover, this also – at least intuitively – captures an old puzzle about topicality. Consider the examples in (30).

In general, the about-argument of negotiate is typically an overt embedded question as in (30a), or a concealed question, as in (30b). This seems to fit naturally with another implementation of the notion of topic suggested by van Kuppevelt (Reference van Kuppevelt1995) and subsequent research, according to which discourse topics can be some questions the discourse is about. This notion has never been seriously connected to aboutness-topic in the sense of Reinhart (Reference Reinhart1981), however (see Roberts Reference Roberts, Maienborn, von Heusinger and Portner2011 for an overview). Thinking of about-arguments as topics of embedded content which may consist of one or more speech acts, however, seems to provide empirical evidence that both notions actually capture the same intuition and may have a common core.

After this intuitive captatio benevolentiae regarding our analysis, let us become a bit clearer on our proposal, before outlining, in the next section, its possible formalization. We suggest that there is a semantic role that we would like to call E-topic (embedded topic), that is introduced in English (among other languages) by the preposition about. If A is the E-topic of a verb V with B as a content, then B must be the content of some discourse D that verifies the respective utterance. A, then, is the discourse topic of D. If D happens to be exactly one sentence S, then A will naturally be the sentence topic of S, which is usually an aboutness-topic.

Since a discourse topic can be either a question (van Kuppevelt Reference van Kuppevelt1995) or an individual (Asher and Lascarides Reference Asher and Lascarides2003, Asher Reference Asher2004), it is not surprising that about can take either of these as internal arguments. Whether or not it is a sensible approach to reduce either of these two topical categories to the other is a question we do not wish to discuss in this article (pace Rawlins Reference Rawlins and Snider2013). It is sufficient to notice that DPs can be topics, regardless of whether they have erotetic implications or not.

Finally, we wish to clarify that while we say that E-topic is a semantic role, we are not in the business of the evaluation and enrichment of the inventory of semantic roles in general (see, e.g., Dowty Reference Dowty1991 for discussion). Similarly, we do not make any strong claims about argument structure as a grammatical category nor its role in the architecture of grammar. Both of these notions are very strongly debated. While these debates are both important and interesting in their own right, they go far beyond the scope of this article. There are very restricted usages of semantic roles in the literature, as well as very permissive ones. Similarly, there are approaches that very closely connect semantic roles to the distinction between arguments and adjuncts (see, e.g., Koenig et al. Reference Koenig, Mauner and Bienvenue2003 for discussion). Here, we make a very limited claim: we suggest that some verbs are compatible with E-topic and some verbs are not. To explain this, we will assume that E-topic is compatible with the meaning of some verbs and not with the meaning of others. Moreover, in the particular framework we propose, this means that this compatibility is lexically coded.Footnote ¹⁴

4.3 E-topic as a semantic role

In this section, we provide a somewhat more explicit discussion of what we mean by E-topic. Our setup will be similar to analyses by Kratzer (Reference Kratzer, Strolovitch and Lawson1998), Hacquard (Reference Hacquard2006, Reference Hacquard2010) and others, but simplified for the purposes of this article.

Let us assume there is a set of role-functions such as size, color, name, theme, agent, degree, location, path, etc. These functions establish a relation between two entities within a semantic model. We assume that role-functions are partial, that is, not every entity is mapped by (say) location to some entity. We will use lexical semantics to handle the arising partiality as suggested by the examples (31); leaving aside the possibility of creating hierarchies of roles to simplify notations.

For explicitness, we assume that all role-modifications are introduced by a role-head which can be either a syntactic operator, the lexical meaning of a preposition, or some other morpheme. We give examples of the first two possibilities in what follows.Footnote ¹⁵

With this background, we can define E-topic as a role-function and introduce it into the lexical entry of all expressions that actually have that role. An example is given in (34). We used the symbol ψ to mark the internal argument of about as a signal that we do not wish to engage in a discussion about the type of this internal argument. We will limit ourselves here to individuals. Of course, instead of the verb to complain, we could have any topic-compatible verb or nominal expression. See Rawlins (Reference Rawlins and Snider2013) for a tentative list of such expressions.

So, what are the exact truth conditional implications of the E-topic role? We will need to assume that verbs and nominals that can have an E-topic come with a hidden relational argument R. Some examples are given in (35).

We do not wish to dwell upon the exact status of this relational argument in the semantic composition, as this is a complication orthogonal to our aims. The only thing we need is that the head noun or verb will make this relational predicate salient, regardless of the way this is achieved at a technical level. This will allow us to explicate the E-topic role as in (36).

1. (36) The E-topic postulate:

   etopic(a)=b iff there is a discourse D such that content(a)=content(D) and b is the discourse topic of D and R(D, a), where R is a relational variable lexically determined by the matrix predicate

To see what this postulate yields, consider two examples:

1. (37)

   1. a. John complained about Peter.

   2. b. John read a book about Peter.

In (37a), Peter is the E-topic of the complaint that John made. This means that there is some discourse D, such that the content of John's complaint equals the content of D. Moreover, Peter is the discourse topic of D. And finally, due to the relational variable made salient by the verb complain, John expressed D.Footnote ¹⁶ Similarly, for (37b), Peter is the topic of a book. This means that there is a discourse D, such that the content of D equals the content of the book under discussion, Peter is the discourse topic of D. Moreover, due to the lexical import of book, we require that D is depicted inside of the book, for example by being written in Latin characters, pictograms or a code nobody except John can understand. In other cases, such as (37a), it is well possible that D contains exactly one sentence. In this case, being the discourse topic would entail being the aboutness-topic (in the sense of Reinhart Reference Reinhart1981) of the relevant sentence.

Consider now the interpretation of sentences such as the ones in (38), which are translated in this framework into the (simplified) formal representations in (39). Since the lexical semantics of verbs like tell or complain request that their possible (event-) arguments be in the domain of the E-topic, it follows that every event of telling or complaining will have such a topic. However, since these sentences do not mark the E-topic, it is not possible to infer what the embedded topic of these verbs is. While one can consider it probable that in (38a) the most likely events that would satisfy the existential quantifier would have Max as an E-topic, it is perfectly possible to imagine plausible scenarios in which this is not the case. For example, Peter's complaint could be about a care-taker whose job was to make sure Max does not dance, or about a particular song that made Max dance, etc. Thus, just because something is the subject of an embedded clause does not entail that it will also be the E-topic of the respective matrix verb.

1. (38)

   1. a. Peter complained that Max danced.

   2. b. Peter told Alfred that Max danced.

2. (39)

   1. a. $\exists e.e\in {\rm complain}\wedge agent\lpar {e\comma \;peter} \rpar \wedge content\lpar {e\comma \;{\rm \;Max\;danced}} \rpar $

   2. b. $\exists e.e\in {\rm tell}\wedge agent\left( {e,P} \right)\wedge theme\left( {e,{\rm \; }A} \right)\wedge content\left( {e,{\rm \; Max\; danced}} \right)$

Before closing this section, we wish to stress that we have neither suggested nor do we wish to suggest that about can only express E-topic,Footnote ¹⁷ nor is it the case that E-topic can only be expressed by about. For example, (40a) is a clearly different usage of about (see Zaroukian Reference Zaroukian2013). The analytical options that come to mind for (40b) seem to be quite numerous, and not all of them commit to the about-phrase being an E-topic.

Similarly, (41a–b) illustrates that the preposition on in English can in some cases mark the same semantic relation as about. This is not incidental, as we find this pattern in other languages. French sur (‘on’) is the default marker of the E-topic role, as in (41c), similarly, the German über (‘on’/’above’) that is used to mark the E-topic relation has a clear special meaning similar to on, as shown in (41d).

5.1 Pe and E-topics in Old Romanian

In this section, we provide evidence that pe could be used to mark the E-topic role in certain cases in Old Romanian.

We start with reconsidering the examples given in (15), repeated here as (42). We are now in a position to show that these examples can be naturally analyzed as involving the E-topic role marked by the preposition pe. As far as the examples (42b) and (42c) are concerned, it should be self-evident that they could be analyzed as involving the E-topic role, hence we see no reason to comment further on them; this would constitute sufficient proof that pe can mark E-topic. However, it seems to us that with some detailed explanation, the other two examples can be understood as involving E-topics as well.

Concerning (42a), one can assume that the noun cheltuială (‘expense’) takes a complement that specifies the object that caused the expenses. At first sight, it may not be obvious why the preposition pe, with a core locative meaning, can be used to mark this complement of cheltuială. Also, since expenses do not seem to involve speech acts, the idea that pe may mark the E-topic role does not seem very natural either. However, we do find the preposition on in English as a more or less idiomatic complement marker of expense and more generally of spend (money), as witnessed in the examples in (43).

One possibility may be that these constructions may have evolved from locative constructions as in (44) and may then have undergone reanalysis: locations and land in particular are often not only the place where you spend money, as in (44), but are also prime objects one purchases with money, for example, when buying fields, dominions, etc.

Crucially, however, we wish to suggest that in such constructions the range of actual inferences associated with the pe- or on-argument of expenditure-verbs is quite large, for pe can mark either the object purchased, the object causing the expenditure, or just a general description of the domain in which the expenditure takes place. A simple way to unify these usages is to think of the on-argument of expenditure-verbs as the topics of negotiation or transaction (arguably) involved in the expenditure. Of course, transactions involved sufficient speech acts to justify speaking of a topic in the relevant period of time for our Old Romanian data (as compared to current click-and-buy-expenditure).Footnote ¹⁸ Moreover, the fact that we do find examples in Old Romanian with tocmi (‘negotatiate’) having pe-arguments that mark the object of the negotiation, as in (42d), adds plausibility to our hypothesis, simultaneously providing a unified analysis for the four examples under discussion.

It is important, however, to see that pe was not the only expression that could mark E-topic. For example, Mardale (Reference Mardale, Dindelegan, Zafiu and Nedelcu2018) shows that the preposition spre (‘towards’) could be used for this purpose as well. Moreover, while proving a negative with limited historical data is not possible, it seems to us that pe could mark E-topics for only a limited range of verbs/nominals. In fact, the empirical picture in Old Romanian appears to be similar to the ability of English on to mark E-topic. For example, while we have seen above some examples where on can be used to mark E-topics, as in (41), it is easy to find examples where about is needed, as witnessed in (45). (Modeling this issue formally, of course, goes beyond the ambitions of this article.)

1. (45)

   1. a. Skylar knows about/#on Mary that she is rich.

   2. b. Skylar said about/#on Mary that she is rich.

The fact that pe in Old Romanian could be used to mark E-topics (though it is probably neither the only nor a general marker of this category), has, in itself, important theoretical consequences. In particular, it provides a new and important way in which the notion of topicality in general is connected to the emergence of DOM, complementing the theoretical inventory hitherto consisting of left-dislocated topics (Iemmolo Reference Iemmolo2010) and secondary topics (Dalrymple and Nikolaeva Reference Dalrymple and Nikolaeva2011). While the Old Romanian data are not sufficient in quantity to establish this specifically for the pe-marked cases, at least analytically, we would expect that E-topics have similar referential properties to other syntactically marked topics, such as left-dislocated topics. If so, in the light of any theory that explains the origin of DOM with reference to the prototypical properties of topics, the simple fact that pe could be used to mark E-topics may be in itself a sufficient reason for pe to grammaticalize into a DO marker, as discussed in more detail in section 5.3.

5.2 Alternation and re-analysis

Having established that pe in Old Romanian can be used to mark E-topic, we now turn to the puzzling argument alternation raised in section 3.2. Our first task will be to establish the semantic arguments of the relevant verbs: jelui (‘complain/mourn’) and tocmi (‘haggle’, ‘hire’). This will allow us to solidify the facts pertaining to the relevant alternation and to the re-analysis postulated in section 3.2. We do this for the two verbs independently.

We begin the discussion with example (18), repeated as (46).

We assume that the verb a jelui may assign at least four semantic roles: agent, E-topic, theme and content. The agent of the verb is the one who does the complaining. In other words, the agent expresses some content by performing a speech act or a series of speech acts. The content is the propositional content of the speech act performed by the agent, which of course need not be a quotation or a direct paraphrase; it can also be an interpretation of that speech act. The content-argument often appears implicit and can be pragmatically reconstructed. The theme – we argue – is the person affected by the content. Finally, the E-topic is the (discourse/aboutness) topic of the speech act that was performed by the agent. While three of these roles seem to be quite natural, the idea that the verb a jelui may have a theme argument of the kind suggested may be surprising at first sight. However, it seems to us that good evidence exists in support of our suggestion.

As a preliminary note, we observe that the notion of complaint usually incorporates that the one who does the speech act of complaining is the one affected by whatever the complaint is about. One cannot complain about the weather on Mars, unless one has either real estate, vacation plans (or comparable business) on Mars. However, at least in English, one can complain on behalf of someone, as shown in examples such as (47). Especially in the case of (47b), it is clear that this is not a simple instead of-reading. This additional argument may not be the most prototypical theme argument, as one may expect some benefactive/malefactive component. However, this is a clearly distinct kind of argument compared to typical benefactive/malefactive arguments often marked by for in English as in (48).

Moreover, in several languages, complaint-like verbs are reflexive. Examples include a se plânge in modern Romanian and sich beschweren in German. In these languages, it seems that it is not idiomatic to add the on behalf type of argument. For example, while in German (49a) is grammatical, it simply has the same benefactive reading as in (49b), and (at least for many speakers) not the reading according to which Alfred was affected by something bad and Peter did the complaining without being personally affected or intending to do a favor for Alfred. (Peter might have complained based on a general feeling of injustice.) Comparatively, in English there is a clear difference between simple benefactive arguments as in (48a) and (48c), which are similar to the German examples in (49), and the variants (48b) and (48d), which have no structurally similar German counterparts. The same argument holds for modern Romanian, where a se plânge tends to resists a usage in which the agent is not affected by the content of the complaint. Native speakers of Russian and Serbo-Croatian have reported similar judgments to us, where, again, complaint verbs have a reflexive form.

This may naturally be explained by assuming that the reflexive argument grammaticalized the identity between the affected person (the theme argument) and the agent of the complaint.Footnote ¹⁹ With this in mind, it seems fair enough to think of the affected person argument of jelui in Romanian as the theme argument. Nevertheless, it is proper to mention that a full analysis of the semantic content of on behalf (which we cannot provide here) would be necessary to complete this argument.

We can now provide a detailed analysis of both structures in (46).

For (46a), we suggest that the agent and the theme are the same person. The reflexive construction amounts to the semantic binding of the reflexive by the subject: the agent surfaces as the subject while the theme is a reflexive object. The E-topic in this case is the oblique PP headed by p(r)e. The content of the complaint is implicit, but could be made explicit with an additional subordinate clause headed by (pentru) că (‘because/that’) or some other oblique nominal construction. The structure is schematically illustrated in (50a).Footnote ²⁰

In contrast, for (46b), and very similarly for the modern Romanian structure in (22b), the most natural analysis is suggested to be (50d), in which the theme is not actually affected by the content (which would be the bad thing that happened to the theme) but instead by the mourning ritual itself.Footnote ²¹ But then, there is the question how these entirely different argument structures may have arisen, and why pe was used in both. Hence, we assume that in the process of developing the argument structure in (50d), there were two intermediary steps. In particular, we start out with the full four arguments in (50a). Again, the agent is expressed as the subject, but this time the theme and the agent are no longer marked as co-indexed, thus they are probably not. Then, the theme and the E-topic can be assumed to be identical in some cases: these are the cases in which the complaint affects the person who is the topic of the speech act of complaint. The content, again, is left implicit, but in most cases it is understood as the property of the E-topic having died or having suffered something comparable (gone missing, gone to jail). Clearly, there is a good enough sense in which one can be affected by death and thereby fulfill what we require for the theme argument. Crucially, we do not assume that in (46b) the theme and the E-topic are realized by the same expression. We merely suggest that they are referentially identical (i.e., they are the same individual). Only one of them is actually overtly expressed, the other one is implicit. In other words, either the E-topic or the theme could be realized by pre nişte cuconi mici. This gives us two different ways to analyze (46b), schematically represented in (50b) and (50c).

The schema in (50b/c) provides exactly what we hoped for in section 3.2: it turns out that the theme and the E-topic arguments of (46b) could, at least at some point in the historical development of Romanian, have been co-referential. And if this is true, the re-analysis of an E-topic as a theme for such examples appears to be entirely plausible. In particular, all we need to assume is that a re-analysis of (50b) as (50c) took place before the 16^th century.

Some more evidence for our analysis comes from example (51)Footnote ²², which is particularly intriguing because it is one of the few cases in which we find the verb jelui (this time written as jălui, a dialectal variant) in a context in which two arguments are present. The first argument is the person who has been affected by some unfortunate event (chief Grigorie) and the second is the actual unfortunate event that happened to this person (he lost money). We have argued above that when a jelui appears as non-reflexive, the affected person is more likely analysed as a theme, whereas when the verb is reflexive, the affected person is probably analysed as an E-topic instead. Hence, we argued, DOM arises from the re-analysis of an E-topic as a theme. Crucially, in this example we also find the content argument, namely what happened, what has been reported during the complaint (as a speech act). Interestingly, in this – rather late – example, the affected argument clearly surfaces as a theme but we still have a content-argument, as predicted by our analysis. In other words, we have the situation in (50c).

In contrast, in modern Romanian, we do not have a content-argument marked with de but rather an explanative construction, as shown in (52). This clearly suggests that the verb has completely altered its argument structure from E-topic- and content-marking to simple theme-marking: from (50c) to (50d).

We can essentially repeat this analysis for (19), repeated here as (53). In fact the re-analysis may strike one as even clearer in this case.

For (53a) we suggest that the verb tocmi (‘haggle’) assigns the semantic roles agent, theme, E-topic, and content. To see how the roles are distributed, consider an instance of haggling as a series of transactional speech acts with the following structure: One person says: “I want you to give me x object for y money”. The other person says “I want you to give me y’ money for x object.” What seems to be clear that the object that is haggled over is the E-topic and the actual offers of the kind mentioned here are the content. Given the near-symmetry between the roles of both interlocutors it is unsurprising that we get a reflexive structure. What may be surprising is that the structure appears with an accusative and not with a dative reflexive. One conceivable explanation may be that haggling was metaphorically conceptualized (in the sense of Lakoff and Johnson Reference Lakoff and Johnson1980 and subsequent literature) as some sort of a fight or imposing one's will upon the other in Romanian: thus, in (53a), the agent is the one doing the haggling speech act, whereas the theme is the one who is combatted with in the speech act iteration scenario.Footnote ²³ The schematic representation in (54a) naturally captures this situation.

Compare (53b), where the verb tocmi (‘hire’) changes its semantics and argument structure only slightly. Again, there is a series of speech acts associated with negotiation, but this time the person who is being hired is the same person with whom one negotiates.Footnote ²⁴ Crucially, this person now has two roles: they are the partner combatted with in the negotiation as well as the target of negotiation. Thus, this time, it is very natural to assume that the E-topic and the theme are the same entity, as suggested in (54b) and (54c). Probably, in the first step, the E-topic was overtly expressed and the theme pragmatically reconstructed, but because of the co-reference the structure may have been re-analyzed as pe-marking the theme. Eventually, in modern Romanian the verb a angaja (‘to hire’) no longer seems to have an E-topic or a content argument, as suggested in (54d).

5.3 The grammaticalization scheme of pe as a DO marker

Above we have shown how using the semantic role E-topic allowed us to find examples in which pe-marked DPs could be re-analyzed: from PPs marking the E-topic role to DPs marking the theme role. In this section, we wish to reflect upon how this could could trigger a move towards DOM in Romanian.

To start with, we are not actually claiming that a re-analysis of any of these particular verbs literally triggered DOM in Old Romanian, in the sense that the first instances of DOM came from these alternations. We could imagine that this is the case, but given that we have no data from the time at which DOM began being used in Romanian, we cannot tell with reasonable certainty. What we wish to put forward, therefore, is the more cautious claim that there were a range of verbs which allowed the re-analysis of pe-PPs as themes (and potentially other semantic roles prototypically appearing as DOs). This re-analysis may have occured before DOM, as such, emerged. Hence the pe-marking themes/DOs in the type of structures we discussed may have been available in the language prior to the emergence of DOM.

Some skepticism regarding whether these initial instances of pe-marking were DOM seems appropriate. For example, E-topics marked with pe did include [-animate] entities which would not have been the usual suspects to be the first marked by DOM. Hill and Mardale (Reference Hill and Mardale2019), however, do claim that some limited [-animate] pe-marked DOs existed in Old Romanian. Additionally, there does not seem to be any well-behaved semantic role that is systematically associated with the notion of being a DO (see, a.o., Kratzer Reference Kratzer2002, Hole Reference Hole2014), even though the role theme is most intrinsically connected to DOs. Also, we have no evidence that DOM even began by marking themes in general in Romanian. If the process was similar to Spanish (see von Heusinger Reference von Heusinger2008), verb classes may have played a role in the evolution of DOM as well, and we cannot tell, given the late stage of DOM our data covers, whether the initial stages of DOM were even remotely connected to the particular verb types exhibiting the E-topic theme alternation. Furthermore, we have no evidence suggesting that E-topics are typically personal pronouns or predominantly proper names, entities that are argued to be the initial targets of DOM in Romance languages (though some correlation between such features and being E-topic probably existed).

Therefore, instead of suggesting that the re-analysis of PPs as DOs literally initiated DOM, we are suggesting that the emergence of DOM may have been driven by the three following factors. First, the re-analysis discussed above created a strong association between pe and DOs, an association that was lacking for any other competing preposition.Footnote ²⁵ Second, this re-analysis provided the grammatical system with examples of marked DOs. Finally, by definition, the E-topic role is closely connected to the notion of topicality in general; we therefore expect that the prototypical E-topic has the same referential and animacy features as the prototypical information structural topic. Hence, the use of pe in its function to mark E-topics may have been correlated with the feature bundle that typically triggers DOM in language after language. This may also have facilitated the use of pe for marking DOs, in terms of a kind of associative bridge based on feature similarity.

When the functional pressure to mark DOs was high enough, these three factors jointly may have made it possible for the DOM process to begin, and pe would have been the most available candidate preposition to become the DO marker. We summarize these findings in one general scheme of the source of grammaticalization of DOM in Romanian in Figure 1. As we see it, the essential cornerstone of this grammaticalization scheme is that pe marks the E-topic semantic role.

Figure 1: Grammaticalization source of pe as a DOM marker in Romanian.

Finally, we wish to stress, as mentioned in our introduction, that one could imagine a fairly simple theory of the grammaticalization of DOM in Romanian that would go like this: E-topics are, by definition, topics, and thus they share prototypical features with subjects. If pe is used to mark E-topics, it does, thereby, also mark prototypical subjects which are – in fact – not subjects of the respective content embedding verb. DOM, in markedness reversal theories, can be conceived of as a very similar phenomenon: marking prototypical subjects that are in fact not subjects, but DOs. Then, one could say that this is all that needs to be said about the origin of DOM in Old Romanian. For all we know, this could be a valid story and – certainly – it is compatible with all findings we presented in this article. Indeed, our analysis could be correct in all details and still this narrative could be told in precisely this way. Moreover, the fact that pe could mark E-topics might explain the grammaticalization of DOM in Romanian – at a more general level – even if our particular analysis of the argument alternation was plainly misguided or incidentally immaterial to the historical processes that lead to DOM.

The goal of this article, however, was not to provide a theory which is compatible with the facts and explain the grammaticalization of DOM at a general level, but to try and go as deep as possible into the details of a step-by-step reconstruction of how pe could have ended up as a DOM marker. We believe that the alternations we uncovered may indeed be a valid grammaticalization mechanism, and that analagous constructions should be scrutinized cross-linguistically.