 Archaeological evidence suggests it was probably enlarged around 1767 and the characteristic gambrel roof as well as two porches were added between this year and the American Revolutionary War.During this war, Gulian Verplanck's son Samuel stayed at the house, while his wife Judith Crommelin remained at the family mansion at 3 Wall Street, New York City.In early 1783 Major General Friedrich Wilhelm von Steuben made Mount Gulian his headquarters.