The fonds consists mainly of the diary of Lieutenant Thistle, Area Intelligence Officer, Prince Rupert, B.C. (Dec. 7,1941-June 30, 1942). In the diary he mentions the bombing of Pearl Harbor and the consequent U.S. entry into the war. He later refers to the effect this event has upon defence operations on the northern B.C. coast and mentions the "roundup" of Japanese fishing boats. Also included in the fonds is a copy of a report that he and Major Dow sent to their Officer Commanding, on Feb. 6, 1942. They have it marked "Secret". Dr. R.H. Roy published an article based on the diary in B.C. Studies (No.31, Autumn 1976).