2 March 1944. Surveyed by Commander N.A.C. Hardy, R.N. assisted by the officers of H.M. surveying ship "Herald" 1936-37. Outer soundings and works in hairline from surveys by Capt. Sir Edward Belcher, 1844-1848. Topography from Sarawak Government…
4 August 1944. From surveys by Captain E.F.B, Law, commanders P.S.E. Maxwell, N.A.C. Hardy and W.C. Jenks H.M. surveying ship "Herald" 1929-1938. Westward of Tanjong Datu from the Netherlands government chart of 1908, additional topography from…