Available in HTML, plain text (us-ascii), Plucker, EPUB, & MOBI formats from Ebook #27089.
Produced from Amazing Stories, March 1961. The HTML version includes artwork from that issue, credited to Ivie (as well as an uncredited end-of-story filler drawing).
The Project Gutenberg wrapper identifies the author as Donald Edwin Westlake, the transcribed text itself as Donald E. Westlake.
"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".