MyHeritage lists the following for LTG John Tulloch:
Birth: Feb 3 1791 - St James, London
Death: Apr 13 1862 - Kensington, Greater London, UK
Parents: Alexander Tulloch, Margaret Tulloch (geboren Munro)
Sister: Margaret Ann Tulloch
Wife: Jacobina Maria Tulloch (geboren Couperus)
Children: Stamford William Raffles Tulloch, General John Samuel Drury Tulloch, Maria Whish (geboren Tulloch), Edward Tulloch, Lt. Charles Browne Tulloch, Alfred Tulloch, Frederick Duncan Tulloch, Arthur Tulloch, Hector Tulloch
So there is an Edward Tulloch, but listed without rank or regiment. Curiouser and curiouser!