 On 6 July 1719 he obtained the colonelcy of the regiment of dragoons later known as the 9th Queen's Royal Lancers, and in 1727 he was promoted to the rank of major-general.He died at his house in Downing Street, London, in March 1732.Allan Fea states that Crofts married a daughter of Sir Thomas Taylor (“after 1706, when he is described as single”) and had a daughter, Maria Julia; and that she married first a Mr Dalziel and secondly R. Wentworth Smyth-Stuart, who claimed to be Monmouth’s son by Henrietta Maria Wentworth.