High Quality Content by WIKIPEDIA articles! The Wallace House is a Georgian style historic house in Somerville, New Jersey.While living at the Dutch Parsonage Jacob Rutsen Hardenbergh sold 95 acres (380,000 m2) of land and a small farmhouse to John Wallace, a Philadelphia fabric importer and merchant. Between 1775 and 1776, Wallace purchased an additional 12 acres (49,000 m2) of land and built the eight-room Georgian style mansion adjoining part of the existing farmhouse. Hew called the estate "Hope Farm," Wallace intended the property to be his place of retirement. In the winter of 1778, George Washington's Continental Army camped at Middlebrook in the Watchung Mountains, 3 miles (4.8 km) from Hope Farm. John Wallace was asked to share his home with Washington and his staff and Wallace House became Washington's headquarters during winter, spending 11 days before moving to Philadelphia to attend Congress for 6 weeks.