From Serampour to the head of the Burrashe, in distance 18 British Miles. J. Rennell, Surveyr. July 1764. Scale 500 yards to an Inch. Lithographed facsimile of manuscript map X/423/3.
As surveyed in Novem: & Dec: 1859 & January 1860. Scale One Inch to 2000 yards. J. Obbard, Salween R. Surv: Vessel, March 17, 1860. T. Black Lith: Calcutta. Manuscript tracing by Barlow, mounted on paper.
As surveyed in October 1856. Scale of a thousand yards to an inch. Joseph Obbard, River Surveyor, H.C.S.V. Cavery, 7th Novr. 1856. T. Black, Asiatic Litho. Press, 4 Waterloo Street, Calcutta. Formerly numbered 2.
Sheet 102 [Chen-Kang-Hsien] Provisional Issue 1904, with additions and corrections from extra-Departmental sources to 1925, reprinted (no changes in map) 1927, 1930.