So I'm currently reading an obscure novel by English occultist, poet, self-appointed religious prophet, and all-round nut job Aleister Crowley called Moonchild. It's actually surprisingly good so far in my humble opinion, but there's a passage in chapter 6 which has been bugging me for a while now. One character says the following:
“Dinner was served; the Poltergeist supplied the conversation. Never before had he been so light, so genial, so anxious to assure us of our future in Summerland; but ever and anon he touched the minor chord, spoke darkly of 'proof,' and of fish! (I beg you all to bear witness that I have not degraded myself by the evident pun). [...]”
If I understand correctly, there's an obvious pun to be made somewhere in what he said, which he didn't make; however, I honestly don't see what this pun could possibly be... If anyone could tell me, it'd be greatly appreciated; like I said, it's been eating me up for quite some time now...
(By the way: I don't think any prior knowledge of anything that happens earlier in the novel is required, but in case anyone's interested, here's a link to the entire chapter in question.)