As surveyed in October 1857. Scale of a thousand Yards to the Inch. Joseph Obbard, River Surveyor, H.C.S.V. Spy, 18th Novr. 1857. T. Black, Lithr: 4 Waterloo Street, Calcutta. Manuscript additions by Barlow. Formerly numbered 4.
As surveyed in October & November 1857. Scale of a thousand Yards to the Inch. Joseph Obbard, River Surveyor, H.C.S.V. Spy, 18th Novr. 1857. T. Black, Lithr: 4 Waterloo Street, Calcutta.
As surveyed in October 1858. Scale 2000 Yards to an Inch. Josh. Obbard, Oct: 27 / 1858. Manuscript copy by Barlow. 'Copied and Reduced, Sept. 1859. R. F. Barlow.' Extension slip, additions and annotations by Barlow: 'By way of filling up what would otherwise be blank space on this Paper, The...
As surveyed in Season 1861/62. Scale 1000 [i.e. 2000] yards to the Inch. Joseph Obbard, River Surveyor, Salween S.V., off Calcutta, 10th March 1862. Manuscript copy, with extension slip, by Barlow. 'Reduced copy: one half the Original Scale.' Formerly numbered 3.
As surveyed in July 1862. Scale 1000 [i.e. 2000] yards to an Inch. Joseph Obbard, River Surveyor, Salween S.V., Rangafulla Channel, the 28th July 1862. Manuscript copy by Barlow. 'Reduced Copy, half the original Scale.' Formerly numbered 4.
154 The Mud Point, Auckland, Dredge & Bedford Channels.
Scope & Content:
As surveyed in August 1863. Scale 1 Inch to a mile of Latitude. Also The Lower Portion Of The Rangafulla Channel. Surveyed also in August / 63. Joseph Obbard, River Surveyor, Salween S.V., off Calcutta, 24th August 1863. Manuscript copy by Barlow. 'Copied and reduced by R.F.B. Nov: 1863.' ...
Surveyed July 1864. Scale 1000 Yards to an inch. F. Laycock, Offg. River Surveyor, Salween S.V., off Calcutta, August 10th 1864. T. Black & Co. Lithrs: Cal:. Annotated by Barlow. Formerly numbered 42.
Surveyed July 1864. Scale 2000 yards to 1 Inch. F. Laycock, Offg. River Surveyor, Salween S.V., off Calcutta, Aug. 10, 1864. Manuscript copy by Barlow. 'Reduced from 1000 yards to the Inch.'
158 The Lower Part Of The Inner Rangafullah Channel From Middle Point To Mud Point.
Scope & Content:
Surveyed December 1864. Scale one Thousand Yards to an inch. F. Laycock, Offg. River Surveyor, Fame R.S.V., off Diamond Harbour, January 2nd 1865. T. Black & Co. Lithrs: Cal:. Formerly numbered 43.