> I have heard from lectures that there was an ancient literary style
> that went out of use about early to mid second millennium BC, the
> title and author were added to the end of a document, instead of at
> the front as is modern practice (since at least the first millennium
> BC to now).
The colophon is explicitly related to the Ptolemy and Cleopatra, so
colophons at the end of documents could be as late as the Hellenistic
period, if not later.