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.
'Below Saugor Anchoring Buoy was surveyed between 2nd and 19 Dec 1844. Above it between Jan 13 and 23./45.' No scale given. Manuscript tracing by Barlow.
Surveyed in the early part of November 1843. Scale of 6000 yards [=4 inches]. A. Bedford, River Surveyor. Manuscript tracing by Barlow ('R. Fred: Barlow Transt: Dec: 14 / 1843'). Annotated by Barlow: 'Very doubtful if any copy exists of this aspect of the channel, either lithographed or engra...
Surveyed Sept: 1843. A. Bedford. Scale of 5000 yards [=5.15 inches]. Manuscript copy by Barlow ('R.F.B. copied Nov: 1843'). Additions by Barlow: The Outer Rangafullah Channel. As surveyed and buoyed off, April 1843.
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.