GREAT TRIGONOMETRICAL SURVEY OF INDIA. 41 



1 Deputy Surveyor-General and Superintendent of the Revenue 



Branch. 

 4 Deputy Superintendents, 1st grade. 



10 „ „ 2nd 

 12 „ „ 3rd 



11 Assistant „ 1st 



11 „ „ 2nd 



12 „ „ 3rd 

 9 Surveyors, 1st grade. 



12 „ 2nd „ 



16 „ 3rd „ 



22 „ 4th „ 



23 Assistant Surveyors, 1st grade. 

 25 „ „ 2nd „ 

 27 „ „ 3rd „ 

 29 ,. „ 4th „ 



The designation of " The Survey of India " was given to the 

 amalgamated Department, which was henceforth to be one body, 

 its officers being held to be available for any description of survey 

 work that might be required of them, and the whole being placed 

 under the orders of Colonel J. T. Walker. 



A brief notice of the previous services of this distinguished 

 officer seems here called for. 



Major (now General) J. T. Walker, KB., C.B., F.R.S., LL.D., 

 &c, succeeded to the Superintendence of the Great Trigonometrical 

 Survey on the 13th March 1861, on the retirement of Major- 

 General Sir .Andrew Waugh ; he became Surveyor-General and 

 Superintendent of Topographical Surveys on the retirement of 

 Colonel Thuillier on the 1st January 1878 ; and he held the three 

 united posts until the 12th February 1883, when he quitted India 

 preparatory to retirement. He had entered the corps of Bombay 

 Engineers in 1844, served throughout the Punjab campaign of 

 1848-49, and had been employed for the next five years in making a 

 rapid military survey of the Northern Trans-Indus frontier, which he 

 carried single-handed over an area of about 10,000 square miles, 

 from Peshawar down to Dera Ismail Khan ; he served in several 

 encounters with the hill tribes on the Trans-Indus frontier, and 

 during the mutiny of 1857 was 'severely wounded at the siege of 

 Delhi ; for his military services he received three medals and three 

 clasps, a brevet majority, and the Companionship of the Bath. 



