Photius’ lexicon contains an entry on the rare adjective ἀναλφάβητος (‘illiterate, ignorant’) that cites Phrynichus Atticista. Based on this testimony, the whole passage has been edited as fr. 19 of Phrynichus’ Praeparatio sophistica. This article demonstrates that in this lemma Photius conflates material which comes from Phrynichus and one other source, hypothetically identified with the anonymous Antiatticist lexicon, which preserves an abridged entry on ἀναλφάβητος and which Photius employed in the compilation of his lexicon. The article also explores the possibility that the work in which Phrynichus dealt with ἀναλφάβητος was not the Praeparatio sophistica but the Eclogue. This hypothesis requires challenging some assumptions concerning the transmission of Atticist lexicography in the Byzantine era, chiefly the assumption that material from the Eclogue did not circulate at Byzantium before the fourteenth century.