HEADQUARTERS OF SURVEY DEPARTMENT. 235 



Successive editions of General Walker's excellent map of "Turkestan 

 " and the countries between the British and the Russian dominions 

 " in Asia " have been produced at the Dehra Dun office, the last 

 (7th ed.) having been issued in 1885. At that time the surveys 

 in connexion "with the Russo-Afghan boundary were actually in 

 progress, and since then our geographical knowledge of Afghanistan 

 and the adjacent regions has been so revolutionised that an entirely 

 new map has become necessary. But during the 20 years that 

 Walker's map has been in existence it has been invaluable as the 

 standard map of that vast and important region between the Caspian 

 sea, the Persian gulf, and Tibet. A full and interesting account 

 of the circumstances under which it was undertaken, and of its 

 general construction, will be found in the appendix to the Report 

 of the Trigonometrical Survey for 1872-73. 



The new map of Afghanistan which wiil, to a great extent, take 

 the place of the foregoing, embodies the surveys and reconnaissances 

 made by the officers and native surveyors attached to the Afghan 

 Boundary Commission. It is in four sheets and on the scale of 

 24 miles to the inch, and the work of preparation, first under 

 Major Gore and then under Colonel Holdich, has been divided 

 between the Calcutta and Dehra offices. Among other cartographical 

 work that has devolved on the latter branch have been the three 



sheets illustrative of A k's remarkable explorations in Tibet,* 



and a two-sheet map of Arabia and Persia for the use of the Resident 

 in the Persian gulf. 



Another important duty devolving on the Dehra Dun branch is that 

 cf protecting the principal stations of the Great Trigonometrical 

 Survey. In 1884-85 the number of these stations was 3,665, and 

 their protection involved correspondence and accounts with a large 

 number of district officers to provide for their repair. 



See above, pp. 152-7. 



