Compiled from the M.S. Maps in the Colonial Office, Captn. Owen's Survey &c. Scale of 200 'English Miles 68.9 = 1 Degree' [=4 inches]. Insets: Environs Of The Cape; District Of George; Environs Of Graham-Town. Scale of 100 'English Miles' [=2.35 inches]. Inset: Cape-Town. From Greig's Al...
As surveyed in December 1857, & January & February 1858. Scale of a thosand Yards to the Inch. Joseph Obbard, River Surveyor, H.C.S.V. Spy, off Calcutta, 22d. Feby. 1858. T. Black, Lithr:, 4 Waterloo St., Calcutta. Annotated by Barlow.
As surveyed in November & December 1859 & January 1860. Scale 2000 yards to an inch. Joseph Obbard, River Surveyor, Salween R.S.V., 17th March 1860. T. Black & Co., Lith:, 4 Waterloo Street, Calcutta.
Manuscript copy by Barlow ('R.F.B. 1875') of map 'Reduced from a Plan published in 1794 and "corrected to 1803" entitled "To His Most Excellent Majesty George III This Plan of New Harbour in Bengal is dedicated by Benjamin Lacam [and printed by] Laurie & Whittle'. No scale given. Manuscript...
Surveyed November & December 1876. Scale 1000 Yards = 1 Inch. F. Laycock, River Surveyor, Kedgeree R.S.V., December 23rd 1876. Photozincographed under the Superintendence of Captn. J. Waterhouse, Surveyor General's Office, Calcutta. Manuscript additions, extension slip and annotations by B...
Surveyed November & December 1877. Scale 1000 Yards = 1 Inch. F. Laycock, River Surveyor, Clyde R.S.V., December 17th 1877. Photozincographed under the Superintendence of Captn. J. Waterhouse, Surveyor General's Office, Calcutta, January 1878. Manuscript additions and annotations by Barlow.