Bob Rogers verified doing the backgrounds to this cover in an interview w/Roger Hill in Alter-Ego #7 (Winter 2000).
On the inside front cover.
House advertisement for Whiz Comics (Fawcett, 1940 series).
Story title taken from the cover.
Alter-Ego #6 (Autumn, 2000) features an article on Mac Raboy by Roger Hill, and on page 12, displays the last page of this story, revealing that the majority of the figures used were "paste-ons" [many of which had fallen off the original art], a tactic often used by Mac Raboy because of his slowness and running up against story deadlines.
Oddity: on page 10, panel 4. Captain Marvel Jr. mentions his heroic name, but does not change back into Freddy Freeman.
Oddity: on page 11, panel 2, Captain Marvel Jr. mentions the name of Captain Marvel, Senior, but does not change back into Freddy Freeman.
The last panel on page 14 gives the title of next issues' story: "Hitler's Headquarters of Horror".
House advertisement for America's Greatest Comics (Fawcett, 1941 series) #3 (May 13 - August 12, 1942) stated would be on sale on May 13th.
House advertisement for Bulletman (Fawcett, 1941 series) #6 (July 15, 1942), stating it would be on sale on May 13th.
Story title taken from the contents page.
Carlson is best recognized by his horses: long narrow, tapering heads and on the first page, the horse running with front legs stretched out like a rocking horse.
House advertisement for Wow Comics (Fawcett, 1940 series) #6 (July 15, 1942) with a cover reproduction that focuses on Commando Yank and deletes the Phantom Eagle.
On the inside back cover.
House advertisement for Spy Smasher (Fawcett, 1941 series) #5 (June 24, 1942).