English physicist (1891-1974) who was awarded the 1935 Nobel Prize in Physics for his discovery of the neutron in 1932, thus paving the way towards the fission of uranium-235 and the creation of the atomic bomb. ALS, one page both sides, 8 x 10, Wynne's Parc letterhead, October 29, 1961. Letter to Leslie R. Groves, recalling their collaboration during the Manhattan Project. In part: "I received quote a number of letters and other messages on the occasion of my 70th birthday but none gave me greater pleasure than yours. It was most kind of you to write and I appreciate very much your remarks about our association during the latter years of the war, for this was, to me, the happiest aspect of a difficult and anxious time. When I was in London last week I saw Dr. Rosbaud whom you met recently in New York. He told me that you had retired from business—which I was sorry to hear but I suppose time must overtake even you—and that you were writing your memoirs. I shall await their publication with interest. I will even read them with interest. I say this because a good deal has been written on these matters which I will not read because so much is quite wrong. So far I have refrained from writing anything—even a review." In fine condition. A fantastic association piece, interesting in its mention of Dr. Paul Rosbaud—a German scientist and wartime spy.
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