[Transcriber Note: This etext was produced from IF Worlds of Science Fiction May 1954. Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] [Sidenote: _The Earth was green and quiet. Nature had survived Man, and Man had survived himself. Then, one day, the great silvery ships broke the tranquillity of the skies, bringing Man's twenty-thousand-year-lost inheritance back to Earth...._]…
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