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  4. Document 325

A.E.C. Files (Historical Doc. No. 166)

The President to the Director of the Office of Scientific Research and Development (Bush)1

secret
Washington, July 20, 1943.

Dear Van: While the Prime Minister was here we discussed the whole question of exchange of information regarding Tube Alloys , including the building project.

While I am mindful of the vital necessity for security in regard to this, I feel that our understanding with the British encompasses the complete exchange of all information.

I wish, therefore, that you would renew, in an inclusive manner, the full exchange of information with the British Government regarding Tube Alloys .

Sincerely yours,

Franklin D Roosevelt
  1. This letter was delivered to Busies office in Washington while Bush was in England, and he was informed of its contents by cable. Concerning the garble in the message as he received it, see post, p. 645.↩