""St. John-Land: A Retro-Prospectus In Two Letters, Supposed To Be Written Some Years Hence"" is a book written by William Augustus Muhlenberg and published in 1864. The book is written in the form of two letters, supposedly written in the future, that describe the fictional island of St. John-Land. The letters are written by two characters, one of whom is a former resident of the island and the other is a visitor. The book provides a detailed description...