It's likely my James Norris is one of the two men with that name listed in Freebmd.rootsweb.com index as dying in Mere (Wilts) registration district in either June 1842 or December 1843 quarters. He is not in the 1851 Wiltshire census that I could identify. I believe he was baptised at Sedgehill on 20 November 1785, son of William Norris & Elizabeth Crane.
A friend found for me on Ancestrylibrary.com the digital image of a document with a James Norris in the 95th Regiment of Foot as a corporal, with the annotation beside his and other corporals' names - "Waterloo Men". I had thought this document referred to recipients of the Waterloo Medal; possibly I am wrong here?
The only real evidence I had about my James being a soldier was in the marriage entry in 1844 for his son William & Eliza Short at Sedgehill, when James is described as "a soldier", plus a family tradition that a Norris ancestor had fought at Waterloo and lost a leg.