WAR DEPARTMENT GENERAL STAFF
MILITARY INTELLIGENCE DIVISION G-2
Washington, December 6, 1941.
Memorandum for Colonel Holbrook:
Word has just been received from O. N. I. by telephone to the effect that the Japanese Embassy, in Washington, D. C., was reliably reported to have burned its Code Book and Ciphers last night.
James F. Perry,
JAMES F. PERRY,
1st Lt., Military Intelligence,
(PROCEEDINGS OF CLARKE INVESTIGATION pg. 173)