On sale date from the publication date found in the Catalog of Copyright Entries, Part 2, Periodicals, New Series, Volume 35, 1940, Number 2. Class B periodical. Copyright number B 452941.
Pencil & ink credits provided by Jean-Paul Gabilliet (October 9, 2004) based on a page of original art from this story. Original pencil & ink credits given to: Gus Ricca.