India Sheet VIII Bengal Presidency published 1 June 1831.
Scope & Content:
Scales of 100 'British Miles 68.8 = 1 Degree' [=2.82 inches], etc. Includes parts of Bengal, Orissa, Sikim, Bhotan, Lower Assam, Cossya, Silhet, Tiperah and Chittagong.
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:.