Signature of J. G. C. was removed before printing of Star Ranger (Chesler / Dynamic, 1937 series) #4 (June 1937), but it appears in the reprint of this story in Strange Mysteries (I. W. Publishing; Super Comics, 1958 series) #10 (1963). Such a signature in Ziggy Pig #7 hasn’t been confirmed yet, but the art itself is still by Chambers.