Miriam Allen deFord was an American writer.
Born in Philadelphia, Pennsylvania, she worked as a newspaper reporter for a time and, in the early 1900s, was also a campaigner and disseminator of birth control information to women. Her feminist work is documented in From Parlor to Prison: Five American Suffragists Talk About Their Lives, edited by Sherna B. Gluck.
She spent perhaps the most energy in mystery fiction and science fiction. Hence she did several anthologies in the mystery world.
She also had interest in historical crime or criminals. In 1968 she wrote The Real Bonnie and Clyde. She also wrote The Overbury Affair, which involves events during the reign of James I of Britain surrounding the murder of Sir Thomas Overbury. For the latter work she received a 1961 Edgar Award from the Mystery Writers of America for Best Fact Crime book. She also worked for Humanist magazine and she was one of the signers of the Humanist Manifesto.
However, in 1949 The Magazine of Fantasy & Science Fiction began with Anthony Boucher as editor. Anthony Boucher wrote science fiction and fantasy but also garnered attention in the mystery field as well. This gave his magazine some cross-over appeal to mystery writers like Ms. deFord. Hence much of her science fiction first appeared in Boucher's magazine. Her stories there dealt with themes like nuclear devastation, alienation, and changing sexual roles. Her two collections are Elsewhere, Elsewhen, Elsehow and Xenogenesis. She also edited an anthology of stories mixing science fiction with mystery called Space, Time, and Crime.