In the 1860s, Captain Thomas Montgomerie trained natives to be surveyors, and had them explore the region covertly. These men, known as pundits, were disguised
The Great Game in Central and South Asia, 1757-1947. The Story of the struggle between Russia and Britain for imperial influence over southern and central Asia.
There have been a great many books written on military intelligence and the secret services rooted in the twentieth century; however there is very little coveri