SF Encyclopedia Picture Gallery
Fletcher Pratt. Double in Space: Two Novels (Garden City, New York: Doubleday and Company, 1951) [coll: two book-length tales: "Project Excelsior" (December 1951 Thrilling Wonder as "Asylum Satellite"): "Wanderer's Return" (October 1951 Thrilling Wonder): the latter being replaced in the 1954 UK edition by "The Conditioned Captain" (May 1953 Startling): hb/Richard Powers]
Image courtesy of Clute Science Fiction Library at Telluride