Napoleonic Wars 1799 1815 (General)
I'd start in Gloucester at the Glosters Museum
http://www.glosters.org.uk/introduction/
They have a database of "most" enlisted soldiers.
http://www.glosters.org.uk/archive/
or Gloucestershire Archives
Clarence Row
Alvin Street, Gloucester, GL1 3DW
01452 425295
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Ἀριστοτέλης A Gloster & Hereford Boy in the Forest of Dean ><((((*>