Available in unpaginated HTML, plain text (us-ascii & iso-8859-1), & Plucker formats from Ebook #23892.
Produced from Amazing Science Fiction Stories, September 1959. The HTML version includes artwork from that issue attributed to Finlay & legibly signed Virgil Finlay. It also includes the cover from that issue (here uncredited but known from other sources to be by Albert Nuetzell); this is the story listed on the cover. The HTML version also includes a table of contents to the chapter divisions (hypertext links).
The Project Gutenberg wrapper gives the author as "William Fitzgerald Jenkins (AKA Murray Leinster)", the text as "Murray Leinster".
"Minor spelling and typographical errors have been corrected without note."
"Produced by Greg Weeks, Stephen Blundell and the Online Distributed Proofreading Team at http://www.pgdp.net".
Gutenberg decided that this was covered by the copyright renewal for the novel version, "Four from Planet 5" and removed this from their site in August 2012. The number was reused for a different work.
