This house served as General George Washington’s army headquarters on four occasions during the Revolutionary War. Here in 1780, after reviewing the evidence in the case of Major John Andre, adjutant general of the British Army, Washington approved the report of a board of general officers condemning Andre to suffer death as a spy. Here, at the conclusion of peace in 1783, the British commander-in-chief, General Sir Guy Carleton, was sumptuously entertained by Washington when they met to plan the orderly evacuation of New York City by His Majesty’s forces. The house was built in 1700 by Daniel De Clark, leader of the Tappan patentees, who bought all this part of the country from the native Indians in 1682. The property passed into the possession of John De Wint, a wealthy planter from the West Indies, in 1746, and was known as the De Wint Mansion when Washington sojourned there.
