Astounding Science Fiction April 1951 (Volume 47, Number 2)
Illustrations by Ed Cartier, Paul Orban, Hubert Rogers, Ward. Cover by Hubert Rogers (for "Temple Trouble.")

Novelettes: "Temple Trouble" by H. Beam Piper ("Paratime" series)
"A Stitch in Time" by Sylvia Jacobs.

Stories: "The Peddler's Nose" by Jack Williamson
"The Weapon" by Fredric Brown
"Dog" by Oliver Saari
"Prodigal's Aura" by Raymond Z. Gallun.

Science: "Probabilities and Punctures" by Milton A. Rothman,
"Wanted - Help" by R. S. Richardson.

John W. Campbell's editorial is "Causus Belli"; Book reviews by P. Schuyler Miller.