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July 25, 1950

Professor Robert H. Pfeiffer
Route 1
Westport, Connecticut
Dear Professor Pfeiffer:
As soon as “World in Collision” was published, I had ordered that a copy should be sent to you. Possibly you had already the chance to read it. In this case, I would appreciate it if you would care to communicate to me whatever reaction or criticism it evoked in you.
Cordially yours, Immanuel Velikovsky