When his father died in 1751, he inherited Philipsburg Manor, a hereditary estate comprising much of southern Westchester County, the accompanying title, and commercial interests, including the share of family holdings his father had received from Adolphus Philipse, a bachelor uncle and son of Frederick I, the first Lord of Philipsborough. He did not receive his uncle's “Highland Patent”, a tract later known as the Philipse Patent, which became today's Putnam County, New York. It was divided among three of his siblings: Philip, Susannah, and Mary.
Career
Philipse was a member of the Assembly of the colonial Province of New York, and a Colonel in the militia.
Like the rest of his family, Philipse was a Loyalist during the American Revolution. He was arrested and imprisoned by Colonial authorities on August 9, 1776, on order of George Washington. After numerous charges and many travails he was paroled on December 23 by Governor Trumbull of Connecticut, where he had been held. In the spring of 1777 he warned the British garrison at Knightsbridge of an impending Colonial raid. His note was intercepted, causing Philipse and his family to flee to British-held New York City, never to return to their estate. There they moved into Philipse's large house at Whitehall and Stone Streets, where they spent the rest of the war. Philipse integrated himself and his wife into Loyalist society, purchased commissions in the British army for his five sons, and their daughters were "the talk of New York's winter balls as they had been in pre-war days". Victim of an effort led by his own cousin, John Jay, Philipse was attainted by the Provincial Congress of New York in 1779 and his Manor and other lands in today's Westchester County were seized. Several months later their sale was ordered. Philipse family holdings belonging to other members, principally the Highland Patent, were also seized by the Commissioners of Forfeitures. Sale was withheld during the war, as its outcome was uncertain, confiscated lands had been pledged as collateral against monies borrowed by the provisional government to finance the conflict, and tenants lobbied for the right of preemptive purchase of leased land. Sale proceeded after the Revolution ended. In spite of assurances of restitution in the 1783 Treaty of Paris signed with the British, and the enormous sum raised - the better part of a quarter of a million pounds Sterling - New York's Provisional Congress reneged and no payment from them was forthcoming. Later, it is claimed by Bielinski, Philipse was "compensated handsomely by the crown" for his loss. No amount was specified, only a prior reference by him to a royal pension granted Philipse for his "attachment to his majesty's government" that only reached 200 pounds by 1782, a minute fraction of the over 220,000 pound loss he had suffered via attainder. Some 35,000 or so acres of the Philipse estate were purchased by almost 200 tenant farmers who had previously worked their parcels, which averaged 170 acres apiece. In all, there were 286 new properties owners, 16 of which could be characterized as outside speculators, who acquired some six percent of the land. Two of these, however, acquired prime parcels, Cornelius Low the Manor Hall and Gerard Beekman the Upper Mills. Historian Beatrice G. Reubens argues that the confiscation of Loyalist estates was a major reform for social and economic equalityupstate New York. The state law of 1779 permitted attainted as well as patriot tenants on confiscatory lands to have the first right to purchase farms on which they resided. About 80 percent of the new owners of Philipsburgh Manor were small farmers, most of whom had been tenants.
Charlotte Margaret Philipse, who married Lieutenant Webber of England
Elizabeth Philipse, died in Bath, England
Catherine Phillips, who died young.
On April 30, 1785, at the age of sixty-five, Frederick Philipse III died in St. Oswald’s Parish in Chester, England, three years after the Treaty of Paris in 1783. After losing his New York holdings due to his loyalist stance during the American Revolution, Frederick III and his family relocated to the area, where he spent the remainder of his life. On May 2, 1786, he was buried in Chester Cathedral. In 1787, a British court decided that the inheritance rights of heirs to property that was confiscated by the Americans during the American Revolution was recoverable.
