Second 'The Frontier Scouts' and I'd suggest looking at journals of imperial history / commenwealth history and maybe de-colonisation. Best of all get 'The Men Who Ruled India' by Philip Mason, pub. 1985; better known as author of 'A Matter of Honour: Indian Army 1746-1947'). District Officer obituaries are a good start, some refer to their own books, I use the daily Telegraph, although The Times can help. Further back 'Soldier Sahibs' by Charles Allen, pre-Mutiny time.

davidbfpo