Japanese warships sighted of Sarawak according to the U.S. Joint Intelligence Committee. Daily summary dated 19 December 1941

An item referred to Admiralty London reporting that ten large warships, a tanker and a submarine of the Japanese were sighted at the coast of Sarawak.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 9 dated 19 December 1941.