William Duer (delegate)

William Duer (March 18, 1743 – May 7, 1799) was a British-born American lawyer, developer, and speculator from New York City. A Federalist, Duer wrote in support of ratifying the United States Constitution as "Philo-Publius." He had earlier served in the Continental Congress and the convention that framed the New York Constitution. In 1778, he signed the United States Articles of Confederation.

Duer was born in county Devon, Great Britain, in 1743. He was the son of John Duer, a planter of Antigua in the West Indies, who had a villa in Devonshire. His mother was Frances Frye, daughter of Sir Frederick Frye, who held a command in the West Indies, where she married John Duer. He was educated at Eton, and while still under age, was put into the army as ensign, and accompanied Robert Clive as aide-de-camp on his return to India as governor general in 1762. He suffered severely from the climate, so Lord Clive sent him back to England, where he remained five years until his father's death, upon which he inherited his father's estate.

Having left the army, he went to Antigua, and thence to New York State, for the first time in 1768, to arrange for a regular and constant supply of lumber for his plantations in Antigua and Dominica. As a planter, he traded extensively with Philip Schuyler, who persuaded him to move to New York early in the 1770s. On a previous trip to the area, he had purchased tracts of land on the upper Hudson River near Albany. The area, known as Fort Miller, served both as Duer's first residence and as the site of his early financial ventures. Duer set up sawmills, warehouses, and a store. In 1773 he went again to England and obtained a contract to supply the Royal Navy with timber for masts and spars. By 1776, had built a moderately successful mercantile business based primarily on lumber production.

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