Western Siberia, Independent Tartary, Khiva, Bokhara &c. published 26 November 1838.
Scope & Content:
Insets: Continuation Of Nova Zemlia (Nova Zembla); Continuation Of Ieniseisk To The North Point Of Asia. Scales of 500 'English Miles 69.1 = one degree' [=3 inches], etc.
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.'