P. Petaus 30, an Egyptian papyrus fragment of a private letter in Greek from Roman Julius Placidus to his father, written about 150 CE by Petaus (Petaus komogrammateus) a village scribe of Ptolemais Hormou (El-Lahun) and surrounding villages, reads in translation as follows:
"Julius Placidus to his father Herclanus, greeting. Dius came to us and showed us six parchment codices (tas membranas hex). We selected none of those, but collated eight, for which I paid on account 100 drachmas. You will be on the lookout in any case. . . I hope you are well. . .by Julius Placidus."
"We get a glimpse here of the ancient counterpart of the door-to-door bookseller. Among his offerings are parchment codices. These were apparently inscribed with texts but were perhaps not well inscribed, since six were not bought. It is not clear whether the eight others that were collated and purchased were rolls or codices . . . (Gamble, Books and Readers in the Early Church  53).