which the schedule became quite irregular, with two or three issues appearing each year until 1949. The volume numbering initially followed the corresponding U.S. editions, with some omitted numbers in 1942 and 1943, and then disappeared for four issues; from the twenty-eighth issue (Spring 1945) the magazine was numbered as if it had been given volumes of twelve numbers since the start of the run. The title was changed from Unknown to Unknown Worlds with the March 1942 issue. Related publications In 1948, Street & Smith reprinted several stories from Unknown in a bedsheet-sized magazine format, priced at 25 cents, with the title From Unknown Worlds. This was an attempt to determine if there was a market for a revived Unknown. Street & Smith printed 300,000 copies, against the advice of John Campbell, but although it sold better than the original, too many copies were returned for the publisher to be willing to revive the magazine. The issue was reprinted in Britain in 1952, reduced in size to and cut from 130 pages to 124; it was priced at 2/6 (two shillings and six pence). Part of the run was issued in a hardcover binding at a higher price. One story from the U.S. version was omitted: "One Man's Harp" by Babette Rosmond. Three anthologies of stories from Unknown were published in the early 1960s. The Unknown Five includes four stories reprinted from Unknown and the first print appearance of "Author! Author!", by Isaac Asimov, which was sold to Unknown shortly before Street & Smith shut it down. Two additional Unknown anthologies were published in the late 1980s. Notes References Sources External links Unknown Worlds in "The Pulp Magazine Archive" at Internet Archive 1939 establishments in New York City 1943 disestablishments in New York (state) Bimonthly magazines published in the United States Monthly magazines published in the United States Defunct science fiction magazines published in the United States Fantasy fiction magazines Magazines established in 1939 Magazines disestablished in 1943 Magazines published in New York City Pulp magazines Science fiction magazines established in the 1930s Street & Smith weird fiction Science fiction magazines disestablished in the 1940s