The Treasure in the Cave

From Author Wars - https://authorwars.com/books/the-treasure-in-the-cave-2676028.html

Overview:

Title: The Treasure in the Cave
Author: Mark Twain
Year: 1961
Type: Short Fiction

Editions/Publications:

Unknown. Haunted Houseful (Unknown, Mark Twain, Random House, $3.95, iv+208 pages, Hardcover, Anthology)