MISTER MYSTERY, Vol. 1, No. 7, September, 1952. Published bi-monthly by Aragon Magazines, Inc., 949 Broadway, New York 10, New York.
On-sale date is publication date in Catalog of Copyright Entries, Periodicals 1952, page 154
The artwork for this story was made into a cut and paste job for the "The Mind Movers" in Weird Tales of the Future (Stanley Morse, 1952 Series) #7. Not a direct reprint.
First name added by Denys Howard on 20 July 2004 from information provided by Jerry Bails.
Previously credited to a "Jon Smalle"
Previously credited to a "Jon Smalle".