45 The Rangafulla Channel as surveyed in May & June 1858.
Scope & Content:
Scale a thousand yards to the Inch. Joseph Obbard, River Surveyor, H.C.S.V. Spy, off Kedgeree, 7th June / 58. T. Black, Lithr: & Engr:, 4 Waterloo St., Calcutta.
56 The Gasper And Thornhills' Channels And The Reef Head Passage.
Scope & Content:
As surveyed in December 1860 and January 1861. Scale One Thousand Yards to the Inch. Joseph Obbard, River Surveyor, Salween S.V., off Calcutta, 17th Feby. 1861. T. Black & Co., Lithrs: & Engravers, Calcutta.
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.
[28b] A Plan Of Thornhill's Channel, So Named By The Marine Board After Cudbert Thornhill Esq: Master Attendant, Under Whose Directions It Was [First] Surveyed March 1807.
Scope & Content:
John Garstin, Colonel of Engineers, Surveyor General. No scale given. Manuscript copy by Barlow. 'Traced from the manuscript plan at the Hydrographic Office of the India House, R. F. Barlow, March 1859.' Further annotated by Barlow.
112 Bengal, River Hooghly. Kedgeree To Saugor Including The Eden, Dredge And Auckland Channels And Saugor Roads.
Scope & Content:
Surveyed by H. A. Jones, Esqre, River Surveying Vessel Clyde, assisted by the officers of the River Survey Department, February & March 1882. Natural Scale 1:36,100. Calcutta, published under the authority of the Port Commissioners, May 1882. 'No. 3.' Photozincographed at the Surveyor Gen...
Sheet 91 made up from Sheet 91 NE [Bilaspur; no date visible], Sheet 91 NW [Kawarda; no date visible], Sheet 91 SE [Rajim] published 6 May 1869, additions to 1888, and Sheet 91 SW [Raipur] published August 1879.
Sheet 92 made up from Sheet 92 NE [Nawagarh; no date visible], Sheet 92 NW [Kanker; no date visible], Sheet 92 SE [Omorkot] published June 1874, and Sheet 92 SW [Sonpur] published August 1880.