July 25, 1950
Professor Robert H. Pfeiffer
Route 1
Westport, ConnecticutDear 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