Surveyed in Novr. 1849. Scale of 1,000 Yards to an Inch. A. Bedford, River Surveyor, Novr. 18th 1849. Lithographed & Sold by T. Black, Asiatic Lithographic Press, Calcutta.
Surveyed in Octr: 1850. Scale of 1000 Yards to an Inch. A. Bedford, River Surveyor, Calcutta, 31st Octr. 1850. Lithographed & Sold by T. Black, Asiatic Lithographic Press, Calcutta. Manuscript additions by Barlow.
Surveyed in July 1852. Scale of 1000 yards to an Inch. Arthur Bedford, River Surveyor, August 2nd 1852. Lithographed & Sold by T. Black, Asiatic Lithographic Press, Calcutta.
Surveyed in Decr. 1852. Scale of 1,000 Yards to an Inch. Arthur Bedford, River Surveyor, Decr. 31st 1852. Drawn on Transfer paper by A. Bedford and Lithographed and sold by T. Black, Asiatic Lithographic Press, Calcutta. Manuscript additions by Barlow.
Surveyed in Septr. 1853. Scale of 1,000 Yards to an Inch. A. Bedford, River Surveyor, Mud Point Channel, October 1st 1853. Drawn on Transfer paper by A. Bedford and Lithographed by T. Black at the Asiatic Lithographic Press, Calcutta.
Surveyed in April 1855. Scale 1,000 Yards to an Inch. Benjn. Bensley, River Surveyor. Drawn on Transfer Paper by B. Bensley. Lithd. by T. Black, Asiatic Lithographic Press, Calcutta. Formerly numbered 3.
As surveyed in May & June 1857. Scale of a thousand Yards to an Inch. Joseph Obbard, River Surveyor, H.C.S.V. Cavery, Diamond Harbour, 14th June 1857. T. Black, Lithr: 4 Waterloo Street, Calcutta.