99 Sketch Of Part Of Estuary Of The Hooghly, From Cowcolly To Mud Point Surveyed June 1844, From Mud Point To Culpee [Surveyed] Sept: 1844.
Scope & Content:
Scale 1 inch to 2000 yards. Manuscript copy by Barlow. Annotated by Barlow: 'Traced from the original in the Bankshall: no lithographed or Engraved copies were taken to my knowledge.'
65 River Hooghly, From Luff Point To The Anchoring Creek, Showing The James And Mary Shoal And The Entrance To The Roopnarain River.
Scope & Content:
Surveyed by Navigating Lieut. J. E. Coghlan R.N. Dep. Supt. [...] under the orders of Commander A. D. Taylor I.N., F.R.G.S., Superintendent of Marine Surveys, during April and May 1875. Manuscript copy by Barlow 'Reduced to a scale of 3 inches to 1 mile from the original, photozincographed chart...