Surveyed June 1866. Scale 500 yards to an inch. F. Laycock, Offg. River Surveyor, Fame R.S.V., off Calcutta, July 3rd 1866. Litho: W. B. Nyss, No. 47 Dhurrumtollah Road, Calcutta. Annotated by Barlow.
Surveyed December 1868. Scale 1000 yards to an Inch. F. Laycock, River Surveyor, Fame R.S.V., January 3rd 1869. Lithographed. Formerly numbered 'No. 49 continued'. Manuscript additions and annotations by Barlow.
Scale 1000 Yards = 1 Inch. River Surveyor, Kedgeree R.S.V., December 22nd 1875. Manuscript, on tracing cloth, cropped and with manuscript extension slips by Barlow, with a new title: A (Rough And Inaccurate) Sketch Of The Channel From Middle Point Towards Mud Point Only. Dec: 1875.
Surveyed October 1879. Scale 500 Yards to the Inch. Samuel Reed, Offg, River Surveyor, Calcutta, November 20 1879. Manuscript copy of chart 'photozincographed at the Surveyor General's Office, Calcutta and dated December 1879'. Annotations by Barlow.
By Mr. S. Reed, assisted by Messrs. Webster, Jones, Waller, Cox, and Le Patourel, of the River Survey Department, January and February 1881. Scale 6,000 Feet = One Inch. Published by the Port Department, Calcutta, under the superintendence of Lieut. A. W. Stiffe, I.N. Port Officer, Calcutta, Ma...