A sprig of yet another hot-shot Scots family. Dear oh dear, aren’t we coming up in the world? Apparently this poor fellow was the son of Archibald, 11th of Duntreath, 1768-1807. (b.1717) 
(Created a Baronet of the United Kingdom, 3rd May 1774 ). Well, well. He seems to have gone to India as a young man, being raised to a high administrative position.

I recommend visiting http://www.edmonstone.com for a history of the Edmonstone family.

A detailed biography of this Neil Benjamin is given in the Oxford Dictionary of National Biography.