Featured on the cover of the September 1937 issue of PRIVATE DETECTIVE STORIES is "Sleep, Baby, Sleep" by Justin Case.  Case was at one time thought to be a house name for the Armer group of publications (including those published under the Culture and Trojan company names), due in part to the number of stories by Case in these magazines.  However, all Justin Case stories were written by the prolific Hugh B. Cave, a fact he revealed in his World Fantasy Award winning collection of pulp stories, MURGENSTRUMM AND OTHERS.