As surveyed in November 1862. Scale a thousand Yards to the Inch. Joseph Obbard, River Surveyor, Salween S.V., off Calcutta, 27th November 1862. T. Black & Co., Lithrs. & Engravers, 4 Waterloo St., Cal:.
As surveyed in January 1864. Scale One Thousand Yards to the Inch. Joseph Obbard, River Surveyor, Salween S.V., off Kedgeree, 12th February 1864. T. Black & Co., Lithrs: Engrs: Calcutta.
Surveyed November 1866. Scale 1000 Yards to an Inch. F. Laycock, River Surveyor, Fame R.S.V., Mud Point, December 6th 1866. Bengal Lithographic Press, No. 47 Dhurrumtollah Road, Calcutta. Formerly numbered 47. Annotated by Barlow.
Surveyed in May 1850. Scale of 1,000 Yards to an Inch. A. Bedford, River Surveyor, Calcutta, May 29th 1850. Lithographed & Sold by T. Black, Asiatic Lithographic Press, Calcutta.
Surveyed in May 1853. Scale of 1,000 Yards to an Inch. Arthur Bedford, River Surveyor, May 17th 1853. Lithographed & Sold by T. Black, Asiatic Lithographic Press, Calcutta.
As surveyed in July 1862. Scale 1000 [i.e. 2000] yards to an Inch. Joseph Obbard, River Surveyor, Salween S.V., Rangafulla Channel, the 28th July 1862. Manuscript copy by Barlow. 'Reduced Copy, half the original Scale.' Formerly numbered 4.
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.