My 4 X great grandfather, Thomas Urquhart, from the northeast of Scotland, enlisted in the 10th Foot in February 1807 and served in Sicily and Spain, before returning to Scotland in early 1815. He enlisted again later that year, this time in the 71st Highland Light Infantry, serving in France as part of the occupation force. He was discharged and returned to Scotland in November 1818.
On both occasions he was accompanied by his wife, Margaret Fraser, although there is no record of her in the muster/pay books or any other army document I can find.
The evidence for her being with him in Sicily and Spain is a later note in the Macduff baptism register of their oldest son, Adam, being born and baptised at Messina in Sicily in 1808. The record names the brigade chaplain who baptised Adam. Censuses all show Adam as being born in Sicily.
The evidence for her being with him in France is the fact that their second child, a daughter Margaret, is always shown as being born in France in 1816 in the censuses. Interestingly, only Adam's baptism was recorded in the Macduff register after they returned to Scotland, not Margaret's.