Signed but the name is impossible to read in the scanned fiche version online. Need confirmation from paper copy.
Credits suggested by Bails' Who's Who.
It's a good bet that Blum did the art on this story as the only other artist known to have done it was Lou Fine in 1941 and his style is easily recognizable. Added by Craig Delich 2013-10-10.
1st Reed Crandall story