3 December 1941
Please retain the "hidden meaning" codes and the codes to be used in conjunction with radio broadcasts until the last moment. If you have already destroyed them, advise and we will retransmit them.
JD-1: 7775 (D) Navy Trans. 12-24-41(CN)
(EXHIBITS OF JOINT COMMITTEE , EXHIBIT NO. 1 INTERCEPTED DIPLOMATIC MESSAGES SENT BY THE JAPANESE GOVERNMENT BETWEEN JULY l AND DECEMBER 8, 1941)