The construction of archaeological arguments is a continuing source of concern. In comparatively recent years archaeological data have come to be seen as a text that can in some sense be ‘read’. Rejecting this approach in favour of arguments constructed by the intertwining of disparate strands of evidence, this article explores the possible meanings of a southern African rock art motif. Variations in the art itself, nineteenth- and twentieth-century San ethnography and studies of altered states of consciousness combine to suggest that this motif, though idiosyncratically depicted by different artists, was associated with the ways in which San shamans broke through into the spiritual realm.

Ancient Egyptian culture was permeated by statements, symbolic and direct, which defined a world of deities and divine power. They amounted to a form of knowledge that was largely divorced from general personal behaviour and which afforded little recognition of individual experience. Furthermore, although practical provision for survival after death was important, life seems not to have offered a quest for enlightenment through enhanced knowledge of the divine. The exemplary life was a career pursued in what was basically a secular society. Our use of the term ‘religion’ for ancient Egypt, whilst justifiable as a convenience, clearly covers a relationship between belief and behaviour which is distinctive for its place and time. In this article, several kinds of evidence for religious behaviour in ancient Egypt are examined in an attempt to assess the nature and strength of the commitment that they represent. The question of whether the populace at large lived by reference to a world of superstitious gesture which has left little evidence behind is only briefly touched upon.

The Chimú state of northern coastal Peru (ad 900–1480) developed massive irrigation-based agricultural systems supplied by intricate networks of canals drawing water from river sources in coastal valleys under their political control. Further intervalley canal systems, some up to 50 miles in length, were constructed to shunt water between river valleys to augment intravalley supplies. A high degree of civil engineering skill was necessary to construct and maintain such complex systems; knowledge of surveying and of open channel flow hydraulics was paramount. Some of the technology used by the Chimú has been investigated: surveying instruments and calculating tools have been unearthed and analyzed to provide some understanding of the technical base used for canal design. Details of the hydraulics knowledge-base have been extracted from computer simulation of the functioning of ancient Chimú canal designs. This article assembles known pieces of information related to Chimú civil engineering practice and attempts to provide a plausible methodology that could have been implemented by the Chimú to survey the precise canal bed slopes necessary for proper hydraulic functioning of large canal systems through rugged Andean foothill and mountain areas.

By 50,000 years ago, the effects of a ‘symbolic explosion’ — an efflorescence of human art, song, dance and ritual — were rippling across the globe. Applied to archaeological evidence, standard neo-Darwinian theory offers new understandings of this improbable event. The present article defines ‘symbolism’, models quasi-ritual behaviour in late archaic Homo sapiens, extends the argument to the emergence of anatomically modern humans and concludes with preliminary tests against archaeological, ethnographic and rock art data.