[Transcriber's Note: This etext was produced from Astounding Science-Fiction, November 1945. Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] Cal Blair paused at the threshold of the Solarian Medical Association and held the door while four people came out. He entered, and gave his name to the girl at the reception desk, and then though he had the run of the place on a visitor basis, Cal waited until the girl nodded that he should go on into the laboratories.…
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