Treasure Island is an 1883 novel by Robert Louis Stevenson. References to it have been made by the Muppets over the years.
Muppet Treasure Island is a feature-length adaptation of the book
Count von Count as Long John Silver in The Sesame Street Storytime Calendar 1982
Susan reads the book in Episode 2740
Ernie reads the book in the July/August 1989 issue of Sesame Street Magazine
Baby Gonzo as Long John Silver and Baby Kermit as Jim Hawkins in Muppet Babies' Classic Children's Tales
Mr. Snuffleupagus reads The Treasure of Snuffleupagus Island (by Robert Louis Snuffleson) in Sesame Street Episode 3565