The eldest son of the 1st Marquess, fled to Brittany with his father in 1484; after receiving several marks of the royal favour and succeeding to the title, he was imprisoned by Henry VII., and remained in prison until 1509. He was on very good terms with Henry VIII., who in 1512 appointed him to command the English army which was to invade France in conjuction with the Spanish forces under Ferdinand of Aragon. In spite of the failure which attended this enterprise, Dorset again served in France in the following year, and in 1516 he was made lieutenant of the order of the Garter. Later he was at the Field of the Cloth of Gold. He was warden of the eastern and middle marches towards Scotland in 1523 and the following years. Henry VIII acquired the manor of Grafton, together with that of Hartwell in 1527 from Thomas 2nd Marquess of Dorset in exchange for the manors of Loughborough and Shepshed (Leics.). Dorset received many positions of trust and profit from the king, and he helped to bring about the fall of Cardinal Wolsey, under whom he had been educated at Magdalen College Oxford. Famed also for his skill in the tournament. He died on the 10th October 1530.