As Surveyed in October & November 1861. Scale One thousand Yards to the inch. Joseph Obbard, River Surveyor, Salween S.V., off Mud Point, 12th November 1861. T. Black & Co., Lithrs: & Engrs:, Cal:.
As Surveyed in July 1862. Scale One thousand Yards to the Inch. Joseph Obbard, River Surveyor, Salween S.V., Rangafulla Channel, 28th July 1862. Published by T. Black & Co., Lithrs: & Engrs:, Cal:, 4 Augt. 1862. Annotated by Barlow.
As Surveyed in July and August 1862. Scale A thousand Yards to the Inch. Joseph Obbard, River Surveyor, Salween S.V., off Calcutta, 13th Augt. 1862. T. Black & Co., Lithrs: & engrs:, Calcutta, No. 4, Waterloo St.
As surveyed in November 1862. Scale a thousand Yards to the Inch. Joseph Obbard, River Surveyor, Salween S.V., off Calcutta, 27th November 1862. T. Black & Co., Lithrs. & Engravers, 4 Waterloo St., Cal:.
64 The Channels Between Mud Point And Middleton Point.
Scope & Content:
As surveyed in December 1862 & January 1863. Scale One thousand yards to the Inch. Joseph Obbard, River Surveyor, Salween S.V., off Kedgeree, 26th January 1863. T. Black & Co., Lithrs: Engrs:, Cal:.