Surveyed February & March 1873. Scale 2,000 yards to an Inch. E. Laycock, River Surveyor, Megna R.S.V., March 17th 1873. Bose & Paulit Lith:, No. 21 Lyons Range. Annotated by Barlow.
Surveyed January 1876. Scale 2000 Yards = 1 Inch. F. Laycock, River Surveyor, Kedgeree R.S.V., February 14th 1876. Manuscript, on tracing cloth, with additions by Barlow.
March 1880. Scale 3000 Feet to the Inch. Sam. Reed, Offg. River Surveyor, River Survey Dept., March 31 1880. Manuscript copy [apparently of a printed chart]. Manuscript additions by Barlow.
January 1880. Scale 6000 Feet to the Inch. Sam. Reed, Offg. River Surveyor, River Survey Dept., March 13 1880, Calcutta. Manuscript copy of a chart 'Photozincographed at the Surveyor General's Office, Calcutta, March 1880'. Manuscript additions and annotations by Barlow.
As surveyed in August & September 1859. Scale one thousand yards to the inch. Joseph Obbard, River Surveyor, H.M.S.V. Spy, off Calcutta, 19th Sept. 1859. T. Black & Co., 4 Waterloo St., Cal:.
110 Bengal, River Hooghly. Gaspar Channel & Saugor Roadstead.
Scope & Content:
Surveyed by S. Reed, Esqre. Commanding River Surveying Vessel Clyde, assisted by the officers of the River Survey Department, February 1882. Scale of [5] Sea Miles [= 5 inches]. Calcutta, published under the authority of the Port Commissioners, April 1882. 'No. 2.' Photozincographed at the Su...
No. 3, containing from Baganbarry to Chilmary, in distance 69 miles. Surveyed in October & November 1765. Scale of [20] British Miles [=9.76 inches]. I. Rennell fect. 1766.