22nd May 1944
The Rt. Hon. Winston S. Churchill, C.H., M.P.
In accordance with your kind permission, I have the honour to send you a brief report about my impressions of the great Anglo-American enterprise, in the scientific aspects of which I have been given the opportunity to participate together with my British colleagues.
Old Grove Rd.
Peconic, Long Island
August 2nd, 1939
President of the United States,