The latest volume of the Antinoopolis Papyri (iii [1967], no. 115) contains fragments of some 40 iambic lines in praise of a certain Archelas. The papyrus is dated by J. W. B. Barns, the editor of the piece, to the sixth century A.D., and the poem itself can be no older, since corrections and alterations show it to be an author's draft. According to Barns it is ‘an iambic encomium of a type not uncommon in late Greek occasional poetry from Egypt’ (p. 20). I would suggest rather that the surviving lines come in fact from an iambic preface to a hexameter encomium.
In the fourth, fifth, and sixth centuries it was standard, if not universal, practice to preface a hexameter poem with an iambic prologue. Since details are not readily available, and are relevant to my argument, I tabulate them here. First the four examples that have come to us by manuscript tradition, as it happens the same manuscript (Palatinus 23), and all dating from the second half of the sixth century.