The heir of a leading courtier, Carey was dubbed a knight of the Bath shortly before his twenty-first birthday. His parents, determined to find him a wife ‘with a great deal of wealth’, at first unsuccessfully sought a match with one of Lady Craven’s daughters, each reputedly worth up to £30,000.
Carey was nominated for Camelford by the Prince’s Council, of which his father was a prominent member, in December 1620; his candidacy was further strengthened by his mother’s Cornish connections, and he was returned unopposed. However, he left no perceptible trace on the records of the third Jacobean Parliament. At the next election the Prince’s Council at first declined to offer him a duchy seat, but belatedly nominated him at Beverley in the East Riding, near his father’s Leppington estate, in place of Sir Henry Vane*, who had plumped for Carlisle.
In the new reign Carey served entirely for Cornish constituencies until his succession to the peerage. With the help of his kinsman Charles Trevanion* he was elected for Tregony in 1625; but he played no known part in the Parliament. Soon after King Charles’s coronation his father was ennobled, and Carey subsequently became known by the courtesy title of Lord Leppington; however, he naturally remained entitled to sit in the Commons. At the next election he was returned for St. Mawes, while his younger brother Thomas was elected for Tregony. On 2 May 1626 he added to the charges of corruption levelled against Buckingham, by furnishing details of Cranfield’s purchase of the mastership of the Wards.
In 1628 Carey again changed constituencies for his brother’s benefit, being elected at Grampound, five miles from the Trevanion home. He was chosen to attend the joint conference of 21 Mar. 1628 on the petition for a fast, and was three times sent to the king to ask for access or to deliver petitions.
Unlike his father and grandfather, Carey was seldom prominent in public life, but preferred to spend his time translating historical and instructive works out of Italian, several of which were published.
