Surveyed in January 1851. Scale of 1000 Yards to an Inch. A. Bedford, River Surveyor, January 13th, 1851. Lithographed and Sold by T. Black, Asiatic Lithographic Press, Calcutta. Manuscript additions by Barlow.
Surveyed in Novr. 1855. Scale 1000 yards to an inch. Benjn. Bensley, Mate Pilot, Novr. 18th, 1855. B. Bensley Lith:. Printed and sold by T. Black. Manuscript additions and extension slips by Barlow.
75 [The New (added in red crayon)] Lloyd's Channel.
Scope & Content:
As surveyed in January 1856 [when it was first buoyed added in red crayon]. Scale 1,000 yards to the Inch. Joseph Obbard, River Surveyor. T. Black, Asiatic Lith: Press, No. 4, Waterloo Street, Calcutta. Annotated by Barlow in July 1877.
81 A Plan Of The Outlet Of The River Hughly From Culpee Downward, As It Was Surveyed In The Year 1770 By John Ritchie Survr. Scale 2 Miles to the Inch. A Sketch Of The Soundings In The Middle And Eastern Channels Of The Entrance Of The Hooghly River As Sounded In The Months Of May And June 1782 By John Ritchie Survr. Scale of [4] Leagues [i.e. 12 miles, = 5.42 inches]. A Plan Of The Entrance Of The Hooghly River Particularly Distinguishing The New Channels And The Positions Of The Buoys.
Scope & Content:
March 1783. By John Ritchie, Survr. No scale given. Manuscript copies by Barlow, in parallel on one sheet,. Endorsed 'Sandheads &c, Ritchie, ½ inch scale, 1770, 1782, 1783, all 3 views to one Scale on one page.'
82 Sketch Of The Hooghly River From Hooghly Point To Mud Point.
Scope & Content:
By James Caldwell, Lieut: of Engineers, January 7, 1789. Scale of [5] Geographical miles [= 4.93 inches]. 'Soundings at low water, Spring Tides, months of November and December (1788?).' Manuscript copy by Barlow. 'Copied from the Manuscript Chart in the India House, March 1859.' Further anno...
83 A New Chart Of The Group Of Islands Commonly Called Saugor Island Comprehending Channel Creek Or Northern Part Of Lacam's Channel From Edmondstone's Island To Frederick's Point And The Navigation Along The Western Side Of The "Saugor Islands" To The New Anchorage, Also A Survey Of Thornhill's Channel.
Scope & Content:
Drawn from the Surveys made by the Hon: Company's Marine Surveyor and his Assistants in the years 1816 and 1817. No scale given. Manuscript copy by Barlow, with extension slip. 'Copied from the Manuscript Chart in the Hydrographic Office of the India House, Feb: 1859 […]. The original has the ...