Notes: Available only as the entire edition, cost $1500. Limited to 2000 copies. Numbered, leather-bound, silk marking ribbon. No dust jacket. Source texts are the G. P. Putnam's Sons hardcovers "The Past Through Tomorrow", 1967, and "Orphans of the Sky", 1964. Full number line on copyright page. "Notes" are included after each Heinlein item. "Future History Letter Essay" was first published in SFWA Bulletin #71, Fall 1979. "Revised Future History Chart" was first printed as endpapers for Shasta Press 1950 edition of The Man Who Sold the Moon and Other Stories. "Second Revised Future History Chart" was first published with G. P. Putnam's Sons 1967 hardcover The Past Through Tomorrow.