Warm Worlds and Otherwise by James Tiptree, Jr.

No one named Tiptree can be found in the Manhattan phone directory, Robert Silverberg notes in his introduction to Warm Worlds and Otherwise (1975) by the mysterious James Tiptree, Jr. Nor could Silverberg find the name in phone books from the San Francisco area. He also came up emptyhanded when consulting the Encyclopedia Britannica— where the only Tip…