Torrens exchanged into the 23rd
Royal Welch Fusiliers, and obtained its command on 15 October 1841. On the expansion of the army in April 1842 a second battalion was given to the regiment. The depot was moved from
Carlisle to
Chichester, where, with two new companies, it was organised for foreign service under Torrens, who embarked with it at
Portsmouth for Canada on 13 May, arriving at
Montreal on 30 June. In September 1843 Torrens went, in command of the first battalion, from Quebec to the West Indies, arriving at
Barbados in October 1843. The battalion was moved from one island to another, but for two years and a half Torrens commanded the troops in
Saint Lucia and administered the civil government of the island. The sanitary measures adopted by Torrens for the preservation of the health of the troops were considered exemplary, and correspondence on the subject was published in November 1847 by order of the Duke of Wellington, as commander-in-chief. Torrens declined the offer of the lieutenant-governorship of Saint Lucia as a permanent appointment. He sailed with his battalion from Barbados in March 1847, arriving at
Halifax, Nova Scotia in the following month. The battalion returned to England in September 1848, and was stationed at
Winchester, where, on 12 July 1849,
Prince Albert presented it with new colours. In April 1850 Torrens moved with the battalion to
Plymouth, and the following year relinquished the command. On 1 January 1853 he was appointed an assistant quartermaster-general at the
Horse Guards, and became a member of a commission researching the military of France, Austria, and Prussia. ==Crimean War==