As Surveyed in season 1861/62. Scale One thousand yards to the Inch. Joseph Obbard, River Surveyor, Salween S.V., off Calcutta, 10th March 1862. Publishd. by T. Black & Co., Lithrs. & Engrs., Cal:, 22d. March 1862.
Surveyed in February 1871. Scale one inch = 1000 yards. J. Pearson, Offg. River Surveyor, R.S.V. Fame, Bedford's Channel, 24th February 1871. Litho: W. B. Nyss, Calcutta, March 1871. Manuscript additions and annotations by Barlow.
53 The Bellary, Rangafulla, Mud Point And Jellingham Channels.
Scope & Content:
Surveyed July 1874. Scale 1,000 Yards to an Inch. Samuel Reed, Asst. River Surveyor in charge, Guide R.S.V., August 9th 1874. Photozincographed under the Superintendence of Captn. J. Waterhouse, Surveyor General's Office, Calcutta. Manuscript additions and annotations by Barlow.
Surveyed December 1874. By Sml. Reed, Asst R.S. Scale 2,000 Yards = 1 Inch. F. Laycock, River Surveyor, Kedgeree R.S.V., January 13th 1875. Manuscript additions and annotations by Barlow.
Surveyed March 1876. Scale 1 Inch = 4 Miles. F. Laycock, River Surveyor, Calcutta, March 30th 1876. Photozincographed under the Superintendence of Captn. J. Waterhouse, Surveyor General's Office, Calcutta. Manuscript additions and annotations by Barlow.
87 The Dredge, Bedford's, Auckland And Eden Channels.
Scope & Content:
Surveyed February and March 1877. Scale 1000 Yards = 1 Inch. F. Laycock, River Surveyor, Kedgeree R.S.V., March 28th 1877. Photozincographed under the Superintendence of Captn. J. Waterhouse, Surveyor General's Office, Calcutta. Manuscript additions and annotations by Barlow.
99A The River Hooghly From Fultah Point To Roychuck.
Scope & Content:
Surveyed March 1879. Scale 1000 Feet to the Inch. Saml. Reed, Offg. River Surveyor, Clyde R.S.V., April 15th 1879. Photozincographed at the Surveyor General's Office, Calcutta, May 1879. Manuscript additions and annotations by Barlow.
64 The Channels Between Mud Point And Middleton Point.
Scope & Content:
As surveyed in December 1862 & January 1863. Scale One thousand yards to the Inch. Joseph Obbard, River Surveyor, Salween S.V., off Kedgeree, 26th January 1863. T. Black & Co., Lithrs: Engrs:, Cal:.