On 26 January 1809, Senhouse rejoined Cochrane, now in command of . After assisting in the debarkation of troops in the invasion of Martinique, he was promoted on 7 March to , which he commanded in the West Indies until the following December. There, he also commanded and . He was promoted to commander on 2 June. From 1810 to 1812, Senhouse commanded at Gibraltar, Newfoundland, and the Halifax Station. He then commanded the 18-gun sloop from 1812 to 1814 in the Halifax Station.