Under the anagrammatic name Grendel Briarton, Reginald Bretnor began a series of pun-terminated short, short stories in the May 1956 issue of The Magazine of Fantasy and Science Fiction, some of which included time travel. Among others, they were a hit with Asimov both imitated and republished them in Isaac Asimov’s Science Fiction Magazine in the 1970s, and they also appeared in various other magazines. In fact, they were such a hit that any story-pun now goes by the generic name of a feghoot. But despite enjoying unforced puns, for me this kind of story is like a cross between that guy who built the Ark and the yellow part of a banana.