The Ptolemies, as a dynasty, were founded by Alexander the Great's general. This is the first sentence from Wikipedia. In turn, Diodorus described the history of Alexander the Great's reign (and the entire history, including his father, A.V., and others, starting with the Trojan War) in his works. And the most famous cultural work from the entire period described by Diodorus is the Iliad. The author of the Iliad is Homer. Snowman chose Homer.
But overall, it's a very good clue, and I would probably even vote for it.