The bits of Deasy's letter that one hears through Stephen's
interior monologue are sometimes easily intelligible,
sometimes elusive. The point of his "Pardoned...classical
allusion" (sorry, it's a way we learned schoolmasters have) to
"Cassandra" seems obvious enough: Deasy is a prophet whom no
one heeds. But who is the "woman who was no better than she
should be," and why is Deasy misogynistically commenting on
her sexual ethics?
Cassandra was a Trojan princess, daughter of King Priam and
Queen Hecuba, whose beauty inspired Apollo to give her the
power of prophecy. But when she refused to reciprocate his
love he added the curse of having no one believe her
predictions. She foresaw the downfall of Troy, which the
Trojans might have prevented had they listened to her.
Similarly, Deasy is predicting the downfall of the Irish
economy if FMD becomes
established in the island, but no
one will listen to his warnings.
It seems unlikely that Cassandra is the woman "who was no
better than she should be": she refused to fornicate with the
god, and her sexual relations after the fall of Troy (first
with Ajax, then with Agamemnon) were coerced. A little later
in the episode, we learn from Deasy's verbatim repetition of
the phrase that he is referring to "Helen, the runaway
wife of Menelaus." What is she doing in the letter?
Apparently it contains digressions within digressions.
[2014] Thornton notes that "a woman who is no better than she
should be" is a proverbial saying going back as far as 1604.
He cites several instances.