author
1905–1994
Known for brisk, imaginative short fiction, this mid-century science fiction writer was also deeply involved in fandom. Her stories appeared in magazine-era SF under both T. D. Hamm and Thelma D. Hamm.

by T. D. Hamm

by T. D. Hamm
The writer published as T. D. Hamm was Thelma Hamm Evans (1905–1994), an American author of speculative short fiction. Reference sources identify Evans as her legal name, and note that she also wrote under Thelma D. Hamm.
She is associated especially with science fiction magazines of the 1950s and 1960s, and several of her stories have remained available through public-domain and volunteer audio archives, which helped keep her work in circulation for new readers. Her known fiction includes stories such as The Last Supper, and bibliographic records connect her with the wider world of magazine science fiction.
Beyond her published work, she was active in fandom for many years. Fannish reference sources place her among the Slan Shack circle in the 1940s and note that she later married E. Everett Evans in 1953; both were described as active participants in 1950s science fiction fandom and convention life.