Hi Jean
Here's some more info, from Dodwell E. & Miles J.S. (1838) Alphabetical List of Officers of the Bengal Army 1760-1834 (Longman, Orme, Browne & Co, London) pp96-97
Lt Col. William Elliot C.B. served with the 4th Bengal Light Cavalry, where was admitted as a cadet (1793) before being commissioned as a 2nd Lt (1794). He skipped full lieutenant and was promoted to Captain (1805), then Major (1806) and finally Lt Colonel (1819). He was invested as a Companion of the Order of Bath (4 Jun. 1815). He died in Diamond Harbour south of Calcutta on board the ship Exmouth (confirming the death notice in Asiatic Intelligence).
[Widowed?], he married Mary Ann (Ann) Fagan on 25 Nov. 1813 at Cawnpore. Have you managed to find more information on his family background (possibly Irish - his son was living in Enniskillen when his Will was drafted in 1814).
