Scales of 500 'British Miles 68.8 = 1 Degree' [=3.7 inches], etc. Manuscript scale note added '140 miles to an Inch, = 1:8870400'. Marked in manuscript to show 'Stations at which Collectors reside'.
Scales of 100 'British Miles 68.8 = 1 Degree' [=2.87 inches], etc. Manuscript scale note added 'Scale of 35 British Miles ... to an Inch = 1:2217600'. Includes parts of Carnatic, Travancore and Cochin.
Scale of [16] Duytsche Mylen 15 voor 1 Graadt [= 4.73"]. Manuscript tracing by Barlow, mounted on paper. Annotated by Barlow: 'This is "No. 258" at page 91 of the official catalogue at the India Office, printed in 1878. The original (copy) is on tracing paper, with between 80 and 90 more Maps, ...
Published as the Act directs Nov. 9 1780 by H. Gregory, 148 Leadenhall Street, London. No scale given. Manuscript copy by Barlow. 'Transcribed by R. F. Barlow. Jany. 9 1841.'
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.
Continuation inset: Eastern Point Of Yeso. Scale of 300 'English Miles 68.94 = One Degree' [=4.24 inches]. Inset: Nagasaki Harbour. Scale of 5 'English Miles' [=2.85 inches].