Carcosa was a specialty publishing firm formed by David Drake, Karl Edward Wagner, and Jim Groce who were concerned that Arkham House would cease publication after the death of its founder, August Derleth. Carcosa was founded in North Carolina in 1973 and put out four collections of pulp horror stories, all edited by Wagner. A fifth collection was planned, Death Stalks the Night, by Hugh B. Cave; Lee Brown Coye was working on illustrating it when he suffered a crippling stroke in 1977 and eventually died, causing Carcosa to abandon the project. The book was eventually published by Fedogan & Bremer. Carcosa also had plans to issue volumes by Leigh Brackett, H. Warner Munn and Jack Williamson; however, none of the projected volumes appeared. The Carcosa colophon depicts the silhouette of a towered city in front of three moons.
(From Wikipedia's entry for Carcosa, fictional city of the Ambrose Bierce story "An Inhabitant of Carcosa" (1891))