Mar lived until 1732, dying at the age of fifty-seven, and he spent the years in losing the confidence of the Jacobites and endeavouring to ingratiate himself with the Hanoverian Kings of England--in which latter quest he was markedly unsuccessful.

His Scotch estates were confiscated, and his title attained--the attainder of the earldom was not reversed until 1824.
Montagu, having tasted the sweets of office, even so minor a place as that of a Lord of the Treasury, was not content to enjoy such pleasures as a private life could afford.

He desired to be somebody.

Probably he worried the Government of the day, possibly he pointed out to the leaders of the Whig Party that he was possessed of parts that should not, in justice to his country, be ignored.

He may even have approached the Throne.