An official Path Through History Site! Throughout the Revolutionary War, John Ellison's 1754 Georgian-style house in Vails Gate was occupied by American commanders such as Major General Henry Knox, and Major General Horatio Gates. For most of the 18th and into the 19th century, the Ellison family had important commercial dealings in milling and trade. From their mill, flour was shipped down the Hudson River to New York City and the West Indies. Remains of the mill, with traces of the underground raceway may be visited, along with the grounds and furnished mansion.