Powell thanks BR for his letter of 13 August, and its enclosed reply from Pauling.

Powell has heard from Yukawa who is also willing to sign, which means replies have been received from everyone BR has written to. "I feel that the response is encouraging and the signatures representative to permit us to proceed. Do you share this opinion? It would, of course, have been more satisfactory to have the two American signatures, but I think the balance has not been too seriously disturbed."