|Commands held||Bombay Army|
Nicolls was commissioned into the 1st Regiment of Foot in November 1756. He became Quartermaster-General in the West Indies in 1794, in which capacity he subdued a rebellion in Grenada. He became Commander-in-chief of the Bombay Army on 22 January 1801 retiring from that post in 1808 to become a member of the Board of Inquiry into the Convention of Sintra under which the defeated French were allowed to evacuate their troops from Portugal without further conflict. He went on to serve as Governor of the Island of Anholt in 1813.
- Richard Cannon, Historical record of the Life Guards containing an account of the formation of the corps in the year 1660 and of its subsequent services to 1835, p. 135
- Great Britain India Office (1819). The India List and India Office List I. Harrison. p. 127. Retrieved 2009-01-08.
- The Inquiry, p. 12
- Parliamentary Papers, House of Commons and Command
|C-in-C, Bombay Army