BTW...I actually asked ChatGPT (just 3.5, don't have 4 access) what story it might be based on a description. Couldn't do it, gave lots of nonsense answers along the way, but when I prompted it with the name of the author and the word "immortal" it finally got it. Was kinda surprised actually, I'd think that's the sort of thing an LLM should be able to do quite well.

In fact, on further experimentation, my only conclusion is god help anyone who tries to use ChatGPT to help with studying literature.