An inactive member of the Commons in the Convention and Cavalier Parliament, Mandeville, as he was styled until his succession to the earldom, never really emerged from the shadow of his more illustrious father and he was equally outshone by his more forceful wife. One commentator described him as ‘a bedchamber pimp’ and he seems to have won a reputation as a ‘gallant’.
Two years after his succession to the peerage on 5 May 1671 (not, as is usually given, 7 May), Manchester took his seat in the House, on 4 Feb. 1673, when he was named to the sessional committees for petitions and privileges. He was thereafter present on approximately three-quarters of all sitting days in the session. Although he was missing from the attendance lists for almost three weeks after his first appearance, he does appear to have been present in the House on occasion during this time, as he was not noted as being missing at a call on 13 Feb. but was then added to the committee for attorneys two days later. Included on the attendance list again on 21 Feb. he was named to a further five committees in the course of the session, including the committee for preparing a bill of advice to the king, which seems to have comprised all those sitting in the chamber that day.
Following the close of the session, Manchester was involved in an argument with his kinsman, Edward Montagu, 2nd earl of Sandwich, over the office of keeper of swans. The quarrel resulted in swords being drawn but seems to have been settled with no more damage done than a scratch to Sandwich’s arm.
By the mid-1670s Manchester had aligned himself with the opposition and, having resumed his seat on 13 Oct. 1675, he was noted as being one of the ‘chief lords for the address’ requesting a dissolution of Parliament on 20 November.
Although Manchester was summoned as one of the triers for the trial of Charles Cornwallis* , 3rd Baron Cornwallis, in June 1676, he was one of a handful who failed to appear.
Manchester was noted as ‘worthy’ by Anthony Ashley Cooper, earl of Shaftesbury, at the beginning of May. He was again the subject of the House’s scrutiny the following February over the Langley v. Twisden case, when Francis Twisden attempted to forestall an action brought against him by producing a protection from Manchester. The House was unimpressed with Twisden’s plea, the protection was set aside and Langley was granted leave to proceed. Absent at a call on 16 Feb. 1678, Manchester resumed his seat on 4 March. On 4 Apr. he voted Thomas Herbert, 7th earl of Pembroke, not guilty in his trial for murder. At the close of the month he left town briefly to attend the funeral of the dowager countess of Warwick.
Manchester took his seat in the House for the following session on 23 May 1678, after which he was present on 44 per cent of all sitting days and named to two committees. He appears to have spent the summer following the prorogation engaged in making improvements at Leez Priory, formerly part of the Warwick estate, but he took his seat once more on 21 Oct., after which his rate of attendance increased considerably to just short of 80 per cent of all sitting days.
In February, in advance of the new Parliament, Manchester’s countess wrote to her niece Baroness Hatton, hoping to see her in town before the session got under way.
In parallel with the moves against Danby, Manchester found himself involved once more in a squabble with some of the inhabitants of one of his manors. On the same day that he voted to attaint Danby (4 Apr.), the House heard a complaint against five individuals who were said to have trespassed on Manchester’s property in Harlow and other locations, breaking down fences and causing other damage there. The House ordered the five to be attached but on 17 Apr. they were released having undertaken to put right the damage they had done. Manchester was missing at a call on 9 May, though it was noted that he would be present the following day. He resumed his seat accordingly on 10 May, when he voted in favour of appointing a joint committee of both Houses to consider how best to proceed against the impeached lords. He then subscribed the protest at the failure to carry this proposal and three days later he put his name to the subsequent protest against the resolution to allow the bishops to remain in the court during capital cases prior to sentencing.
Following the dissolution that summer, Manchester was at the centre of a family dispute over the settlement of property as laid out in the will of his brother-in-law, Robert Rich, 5th earl of Warwick. Warwick had made a number of bequests to Manchester’s siblings, with a reversion to Manchester’s heir, Charles Montagu, then styled Viscount Mandeville (later duke of Manchester). In spite of this, Manchester was accused of having taken control of the estates himself and of insisting on his privilege to prevent the case being brought to court.
Elections for the new Parliament further complicated affairs for Manchester. As his countess explained to Lady Hatton, Essex, where Manchester commanded some interest through his connection with the Rich family, was in a ‘great bustle about the election’ following the intervention of Christopher Monck, 2nd duke of Albemarle.
Manchester’s countess found out about the intention to prorogue Parliament from William Howard, Viscount Stafford, during a visit the Tower the day before the December 1679 council meeting at which the king made the decision.
Manchester’s opposition to the court led to rumours of his impending dismissal from his offices early the following year.
Out of favour and plagued by poor health, Manchester resolved to quit England for France and in March 1682 he was granted a warrant to travel abroad with his cousin Irby Montagu‡ and seven servants.
Manchester died in his self-imposed exile at Montpellier of dropsy in March 1683.
