'The Piscatorial Farce of the Stolen Stomach' is a short story from Dorothy Sayers' book, Lord Peter Views the Body.

Thomas MacPherson, a final year medical student in Scotland, shows Wimsey the very strange legacy his Great-Uncle Joseph Ferguson left him. Great-Uncle Joseph, who died at the age of 95 by throwing himself out of a sixth-floor window, bequeathed his grand-nephew only his stomach and alimentary organs, with their contents, preserved in a bottle. Wimsey suspects there is more to the story than an eccentric old man's whims, especially when he learns that Great-Uncle Joseph was said to be very rich but withdrew more than £84,000 (nearly £5.5 million today) from the bank in the years leading up to his death.
The only other heir, one Robert Ferguson, is a greedy wastrel, and was upset to receive only a pittance...