Cavendish was returned as Member of Parliament for Derby in both the general elections of 1701. He did not stand in 1702, but was elected in a contest at the 1705 English general election, defeating the sitting Tories. He voted for the Court candidate in the contest for Speaker on 25 October 1705 and supported the Court on the regency bill proceedings on 18 February 1706.
He was returned unopposed for Derby at the 1708 general election. He acted as a teller on the petition of defeated Whig candidates at Coventry and later voted for the naturalization bill in 1709 and for the impeachment of Dr Sacheverell in 1710. At the 1710 British general election, he was defeated in a contest for Derby and decided not to stand in 1713.[1]
Cavendish was returned as MP for Derby at the 1715 general election and voted for the septennial bill in 1716 and the repeal of the Occasional Conformity and Schism Acts in 1719. He was returned unopposed at the 1722 and 1727 general elections. In the latter parliament he took an independent line, and voted against the government on the Hessians 1730, the army 1732, and the repeal of the Septennial Act 1734, but with them on the Civil List 1729, and the Excise Bill 1733.
He was elected in a contest at Derby in 1734 and voted for the place bill 1740. He was returned unopposed at the 1741 general election, but on 8 March 1742 he vacated his seat to take up the post of Auditor of Foreign Accounts or Imposts in Ireland. He did not stand again for Derby at the ensuing by-election.[2]
Death and legacy
Cavendish married with £8,000 Anne Yale (died 1734), daughter of Governor Elihu Yale on 6 July 1708.[3] Her sister married Dudley North.
Elizabeth Cavendish, married Richard Chandler in February 1722, one of the two sons of Edward Chandler
As his only son predeceased him by a few months, his heir was his son-in-law Richard Chandler, who subsequently adopted the name of Cavendish by private Act of Parliament (25 Geo. 2. c. 28).[4]