Prolific writer (1909–1971), known for his contributions to the Cthulhu Mythos genre of horror, a shared fictional universe based on the writings of H. P. Lovecraft. Collection of 16 typed manuscripts of Derleth’s short fiction works, various lengths, all on 8.5 x 11 sheets, each signed at the conclusion by Derleth. Titles are: The Closing Door (10 pages); The Man on B–17 (8 pages); The Slayers and the Slain (11 pages); The Extra Child (10 pages); Twilight Play (10 pages); A Battle over the Teacups (10 pages); Halloween for Mr. Faulkner (12 pages); Pikeman (10 pages); McCrary’s Wife (37 pages); Walpurgisnacht (11 pages); Moonlight in the Apple Tree (22 pages); House—With Ghost (8 pages); Hector (6 pages); Monie (11 pages); The Quince Bush (7 pages); and Kingeridge 214 (10 pages). In overall fine condition. An impressive collection of signed titles from the writer best known for his horror work, but prolific in several other genres including poetry. RR Auction COA.