In 1734 Lord Middlesex contested Kent unsuccessfully but was returned for the family borough of East Grinstead, which he represented till 1742, when Newcastle arranged for him to be brought in as knight of the shire at a by-election for Sussex.
the King offered the Princess a master of the horse, but told her it must be a nobleman, and there was one to whom he had an objection: this was Lord Middlesex. She desired none; if she had been disposed to contend, it would not have been of all men in favour of the Lord in question.
Mems. Geo. II, i. 96-97.
Remaining in opposition, he voted in favour of a reduction of the army in November 1751.
Lord Middlesex is the impresario, and must ruin the house of Sackville by a course of these follies. Besides what he will lose this year, he has not paid his share to the losses of the last, and yet is singly undertaking another for next season, with the almost certainty of losing between four or five thousand pounds to which the deficiences of the opera generally amount now. The Duke of Dorset has desired the King not to subscribe; but Lord Middlesex is so obstinate, that this will probably only make him lose a thousand pound more.
He died 5 or 6 Jan. 1769.
