After his brother is killed by the Nazis, Herr Professor Johann Kenrube invents a machine that promises a little of everything to Hitler—unlimited energy and natural resources, instant transportation behind enemy lines, even a smidgen of time travel—but only after the Germans have over-committed themselves, does the truth about the machine emerge.
Kenrube was at Gribe Schloss before two P.M., March 21st. This completely nullifies the six P.M. story. Place these scoundrels under arrest, and bring them before me at eight o’clock tonight.

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  1. “Secret Unattainable” by A. E. van Vogt, Astounding, July 1942.
    2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . written by A. E. van Vogt