Chief of an ancient Fife family, Sir John was known as a numismatist,
In 1760 he inherited a great fortune and the Airdrie estate from the notorious Gen. Philip Anstruther, together with a share of his unpopularity, which was not lessened by his own arrogance, his extravagant building projects, and the ruthless removal of an entire village, reputedly at the whim of his wife, to improve the amenities of Elie House.
On the death of Sir Henry Erskine in August 1765, Anstruther returned post haste from Spa, and, after consultation with Sir Alexander Gilmour, who had already recommended him to Newcastle, stood with Government support for Anstruther Burghs.
Anstruther supported the Rockingham Administration on the repeal of the Stamp Act. Under the Chatham Administration his allegiance was uncertain: in the winter of 1766-7 he was listed ‘doubtful’ by Rockingham and ‘Government’ by Townshend, and in March 1767 Newcastle counted him as ‘doubtful or absent’. In the land tax division, 27 Feb. 1767, Almon records him as voting against Administration, but his name does not appear either in Meredith’s list or in that printed in Paris.
In view of his local unpopularity and the litigation still proceeding over burgh council elections, his prospects of return in 1768 were doubtful. As early as October 1766 he was mentioned as a candidate for Fife, since ‘in all appearances he would lose his burghs’.
At the 1774 election Anstruther brought in his eldest son Philip for the Burghs, and devoted himself to the development of his estates, coalmines and salt-pans. In 1780 he terminated the arrangement under which George Damer had replaced Philip Anstruther in the Burghs, and took back the representation into his own hands, with the intention of serving ‘a session or two’, and thereafter vacating in favour of his son.
He consistently supported North, but did not vote on Cavendish’s censure motion, 8 Mar. 1782, having apparently left London. Robinson sought the intervention of Henry Dundas, who replied, 9 Mar.:
In June Sir John returned to Scotland, and in December resigned his seat to his second son John, thereafter concerning himself mainly with his agricultural experiments
An ailing and emaciated old man,
