In March 1748, Elliot was appointed as the first
sheriff-depute of Roxburghshire, one of the judges introduced in Scotland by legislation passed in the wake of the
Jacobite rising of 1745, a post he held until 1753. Elliot then served in the
House of Commons as
Member of Parliament for
Selkirkshire from 1753 to 1765, and again for
Roxburghshire from 1765 to 1777 during which period his father died on 16 April 1766, and he inherited the
Baronetcy. In parliament, he was a supporter of the policies of
King George III in the
American colonies. His
Papers concerning the Boston Tea Party are in
Harvard University Library. At one time he was a candidate for the
Speaker's Chair in the House of Commons. He was made a
Lord of the Admiralty in 1756, a position he held until his resignation in support of
William Pitt in April 1757, and to which he was reinstated in June with Pitt's return to office Elliot was
Treasurer of the Chamber in the
Royal Household from 1762 to 1770. He was appointed
Treasurer of the Navy in 1770 in Lord North's government, and after was appointed
Keeper of the Signet in Scotland in 1767. Elliot was a friend and follower of the
Earl of Bute.
Horace Walpole said Elliot was "one of the ablest members of the House of Commons". As a politician Elliot was best remembered for performances such as that during the militia debate in 1760 which, again according to Walpole, placed him in an élite group of mid- to late-century parliamentarians who displayed "the various powers of eloquence, art, reasoning, satire, learning, persuasion, wit, business, spirit and plain common sense".
Writing career Elliot was the author of
Amynta, which
Sir Walter Scott described as "the beautiful pastoral song", and which began: My sheep I neglected; I broke my sheep-hook And all the gay haunts of my youth I forsook; ==Personal life==