18th September 1944. Coast and Geodetic Survey Manila, P.I. 1940 ; Sources of information US Coast and Geodetic Survey, U.S Army Engineers, Bureau of Public Works ; Bureau of Lands, Bureau of Forestry and other, Philippine Government Bureaus and…
16th December 1943. Based on standard traverse by A R Miller LS, MIS, 1938-30. Topographical information from 0 km to 32 km from field notes and from 32 km to Maprik from air photography by Australasian petroleum Co.
14 April 1944. From maps of the Sarawak Oilfields Limited Survey Dept dated [blank], corrected to 12.3.41, with annotations from informants, formerly resident.
2 August 1944. Information from informants as at 1941 and map 7(a) S.R.D static report. Shows boundary of swamp area, trackes, metalled roads, Japanese Airfield, rubber estates.