Foreign Relations of the United States: Diplomatic Papers, The Conference of Berlin (The Potsdam Conference), 1945, Volume II

Department of the Army Files: Telegram

No. 1309
The Acting Chairman of the Interim Committee (Harrison) to the Secretary of War (Stimson)

top secret
urgent

Washington, 21 July [19]45.

War–35988. Secretary of War Eyes Only top secret from Harrison.

Patient progressing rapidly and will be ready for final operation first good break in August. Complicated preparations for use are proceeding so fast we should know not later than July 25 if any change in plans.