MP for Tamworth in the 1689 Convention Parliament that on 14 February made William and Mary co-monarchs in place of her father. On 4 April, he was created Baron Milton and Viscount Sydney, became a Privy Councillor and received a number of other offices, including Lord Lieutenant of Kent and Constable of Dover Castle. Sidney accompanied William in 1690 when he took personal charge of the war in Ireland; appointed colonel of the Foot Guards, he fought at the Boyne in July, as well as the sieges of Waterford and Limerick. Recalled to London in December 1690, he was appointed Secretary of State for the Northern Department, before returning to Ireland as Lord Lieutenant in March 1692. Although his tenure was marked by conflict with the Irish Parliament and lasted less than a year, he retained William's confidence; in 1693, he was made Master-General of the Ordnance, then promoted Lieutenant-General and created Earl of Romney in 1694. At the same time, he purchased the office of Chief Ranger of Greenwich Park, allowing him to use the Queen's House as a personal residence. He undertook a series of improvements, one of which was to alter the course of the main road between Woolwich and Deptford, part of which is now called "Romney Road". He remained a close advisor to William and accompanied him to The Hague for the negotiations that led to the signing of the Second Grand Alliance in September 1701. However, when William died and Queen Anne came to the throne in March 1702, he lost most of his offices and retired from active political life; he died of smallpox at his house in London on 8 April 1704, and was buried a few days later at St James's Church, Piccadilly. Legacy Sidney's reputation has been subject to a variety of views; some contemporaries considered him lazy and superficial, while Tory satirist Jonathan Swift dismissed him as 'an idle, drunken, ignorant rake, without sense or honour'. Other perspectives are more charitable and in general present him as "an individual with flaws, but also remarkable for his even temper, straight dealing, good judgement, and a knack for gaining the trust of others". It has been suggested the use of the pheon, or broad arrow, on government property dates from Sidney's period as Master General of the Ordnance. However, the Oxford English Dictionary argues "this is not supported by the evidence",