The on-sale date is from the publication date recorded in the Catalog of Copyright Entries, Part 2, Periodicals, 1942, New Series, Vol. 37, No. 1. No editor, according to the statement of ownership.
Mr. Smith, we've traveled for two weeks and we've yet to see a native tribe.
Genre
adventure; jungle; superhero
Reprints
From Phantom daily strips (King Features Syndicate) 1937-06-25 - 1937-06-26 and 1937-06-28 - 1937-07-03 [One panel is omitted from one of the dailies on each page, in order to fit two 4-panel strips onto each 7-panel page].