I am looking for information about Captain P Campbell's Company, 2nd Battalion, RA, which was detached from the garrison at Cadiz and sent off to Cartagena in January, 1812.

A couple of sources indicate that Captain Campbell was never in Cartagena, having been loaned to or joined the Portuguese Army.

Any information about the Company between January 1812 and December 1814 would be welcome. Unfortunately none of the more recent books on the 'Eastern Front' have any greater detail neither does Oman.