Wikipedia's article on that trial (https://en.wikipedia.org/wiki/Obscenity_trial_of_Ulysses_in_...) suggests that Quinn both didn't like Ulysses and didn't like his clients, to say the least. The whole trial seems to have had numerous absurd elements: critics being asked to "speak in a language that the court can understand", a judge objecting to the offending passages being read out in front of a young woman—one of the two publishers—and insisting that she couldn't have understood what she published, and Quinn apparently blaming the incomprehensibility of Ulysses on Joyce's poor eyesight.