John Carstairs: Space Detective

From Author Wars - https://authorwars.com/publications/john-carstairs-space-detective-313122.html

Overview:

Title: John Carstairs: Space Detective
Author: Frank Belknap Long
Year: 1951
Publisher: Cherry Tree / Fantasy Books
Price: 1/6
Pages: 192
Binding: Paperback
Type: Collection
Title Reference: John Carstairs: Space Detective
Notes:
- Tuck gives the publisher as "Kemsley". OCLC gives it as "Kemsley Newspapers", but dates it as [1949?] (the date of the original Fell hardcover edition), so it must be physically undated.
- Several abebooks.com dealers give the publisher as Cherry Tree, but this may be either a publisher series or imprint. WorldCat calls it a "Cherry Tree Book".
- Cover artist from an abebooks.com listing.