Surveyed in Octor: 1850. Scale of 1000 Yards to an Inch. A. Bedford, River Surveyor, Calcutta, Octr. 31st 1850. Lithographed & Sold by T. Black, Asiatic Lithographic Press, Calcutta.
Surveyed between the 15th of February and 27th of March 1854. Scale of 1,000 Yards to an Inch. A. Bedford, River Surveyor, Calcutta, April 12th 1854. Drawn on Transfer Paper by A. Bedford & Lithographed by T. Black. at the Asiatic Lithographic Press, Calcutta.
Surveyed between December 3rd / 54 and Jany. 3rd / 55. Scale 1000 yards to an Inch. Benjn. Bensley, River Surveyor, January 5th 1855. On Transfer Paper by B. Bensley & Lithographed by T. Black, Lithr. Asiatic Lith. Press, Calcutta. Annotated by Barlow.
As surveyed in October 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 Street, Calcutta. Manuscript additions by Barlow. Formerly numbered 4.
As surveyed in September and October 1858. Scale a thousand Yards to an Inch. Joseph Obbard, River Surveyor, H.C.S.V. Spy, off Calcutta, 27th Octr. / 58. T. Black, Lithr:, 4 Waterloo St., Cal:.
As surveyed in November 1858. Scale One thousand Yards to the Inch. Joseph Obbard, River Surveyor. Published & Lithd. by T. Black & Co., 4 Waterloo Street, Calcutta.
As surveyed in October 1860. Scale of a thousand yards to the Inch. Joseph Obbard, River Surveyor, Salween S.V., off Calcutta, December 1860. T. Black & Co., Lithrs. Engrs., Calcutta.
As Surveyed in October 1860. Scale a thousand yards to an inch. Joseph Obbard, River Surveyor, Salween S.V., off Calcutta, 21st November 1860. T. Black & Co., Lithrs: & Engrs:, Cal:.