Surveyed in January 1851. Scale of 1000 Yards to an Inch. A. Bedford, River Surveyor, January 13th, 1851. Lithographed and Sold by T. Black, Asiatic Lithographic Press, Calcutta.
Surveyed between Septr. 18th and Octr. 3rd 1854. Scale 1000 yards to an inch. A. Bedford, River Surveyor, October 7th 1854. Drawn on Transfer paper by B. Bensley, Lithd. by T. Black, Asiatic Lithographic Press, Calcutta.
As surveyed in October & November 1857. Scale of a thousand Yards to the Inch. Joseph Obbard, River Surveyor, H.C.S.V. Spy, 18th Novr. 1857. T. Black, Lithr:, 4 Waterloo St., Calcutta.
As surveyed in October 1858. Scale a thousand Yards to an Inch. Joseph Obbard, River Surveyor, H.C.S.V. Spy, 27th Octr. 1858. T. Black, Chromo-lithr:, 4 Waterloo St., Calcutta.
As Surveyed in October & November 1861. Scale One thousand Yards to the inch. Joseph Obbard, River Surveyor, Salween S.V., off Mud Point, 12th November 1861. T. Black & Co., Lithrs: & Engrs:, Cal:.
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:.