Inside front cover.
Ajay likely stood for the initials "A.J." Possibly Andrew J. Hull, of PM, the short-lived New York daily that preceded the New York Star.
From the 14 May 1943 issue of PM: "This is going to get complicated right now, but we have two Ajays. The original, is Andrew J. Hull, another artist in our department who once worked some place where there was another man with his name. As a result, they made up the name Ajay from Hull’s first two initials and pinned that on him so he wouldn’t be confused with the other man and he has been using it ever since." –John P. Lewis (editor)
Based on the magazine "Secret Agent 'X'" May 1934 story; per Mark Trost in Blood 'n' Thunder #30 (Summer 2011). Brant (not Brand) House was the pen name of the writers for the Secret Agent 'X" pulp.
Based on the magazine Captain Hazard pulp story for May 1938, per Mark Trost in Blood 'n' Thunder #30 (Summer 2011).
Based on the story "The Sinister Sphere", the first Moon Man story, which appeared in Ten Detective Aces June 1933; per Mark Trost in Blood 'n' Thunder #30 (Summer 2011).