_Illustrations by_
SOL LEVIN
_Introduction by_ JOHN W. CAMPBELL, JR.
THE PRIME PRESS
Philadelphia
1949
[Transcriber's Note: Extensive research did not uncover any
evidence that the U.S. copyright on this publication was renewed.]
Copyright 1942, 1943, 1944, 1945
by Street and Smith for
Astounding Science Fiction
Copyright 1947 by
THE PRIME PRESS
First printing, 1947
Reprinted, 1949
THE PRIME PRESS
Box 2019--Philadelphia 3, Pa.