As Surveyed in season 1861/62. Scale One thousand yards to the Inch. Joseph Obbard, River Surveyor, Salween S.V., off Calcutta, 10th March 1862. Publishd. by T. Black & Co., Lithrs. & Engrs., Cal:, 22d. March 1862.
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:.
As Surveyed in November 1858, and corrected and enlarged in January 1864, to include the New mouth of the Mahanuddee which formed in November 1863. Scale One thousand Yards to the Inch. Joseph Obbard, River Surveyor. T. Black & Co., Lithrs:, Calcutta.
As Surveyed in January 1863. Scale A thousand Yards to the inch. Joseph Obbard, River Surveyor, Salween S.V., off Kedgeree, 27th January 1863. T. Black & Co., Lithrs: & Engrs:, Cal:. Annotated by Barlow.
As surveyed in August 1863. Scale a thousand Yards to the Inch. Joseph Obbard, River Surveyor, Salween S.V., off Calcutta, 21st August [18]63. Lithographed.