I've been researching my 4 x Great Uncle Thomas Sheldon and have found a ton of information about him having first got a copy of his discharge papers from the National Archives at Kew. He was born in 1794 in Beeston, Nottingham and enlisted in the Royal Horse Artillery in 1811 at Boston, Lincolnshire being noted as 'underage' but he took part in the Battle of Waterloo being now a Gunner/Driver and despite having 4 horses shot from under him, survived and ended up being discharged in 1840 with an exemplary record and was an 'out' Chelsea Pensioner. He then moved back to Arnold, Nottingham and died aged 80 in 1875. I have alot more than that but I've just put a snippet of the information about him here.