The other rarity that has so far been beyond my reach is his science fiction story, A Trip to the South Pole, which was collected in the 1973 book At the Mountains of Murkiness and Other Parodies, edited by George Locke. The book claims the story was originally published back in 1899, fourteen years after Huntley died, so it may be something that Florence dug out of his papers and published somewhere to raise money, or it may have been reprinted in 1899 from someplace else, or may have been by someone else named Stanley Huntley! In any event, I have found copies of this book on some dealers lists for outrageous amounts of money, so I will probably have to wait a long time to see it.
Well, it has turned up! The Brooklyn Daily Eagle archive never showed it in a search, but I stumbled into it. Apparently, even though the story (presented over the course of three Sunday editions in 1880) was put into Huntley's Sunday Salad feature, the author was credited as "Jules Verne, Jr."
A Trip to the South Pole is a great spoof of the French Science Fiction master's works from a contemporary satirist of the first rank! Keep an eye out for it to begin on April 15th!