house to strategize with Rochambeau while their troops waited outside on what is now the Parade Ground and Vault Hill. He later lit campfires outside the house to deceive the British into thinking that his troops were still on the grounds. Washington used the house one final time in 1783 after the Treaty of Paris. The British had just withdrawn their troops from Manhattan, and Washington and George Clinton were getting ready to enter the island, stopping over at the house before doing so. In the 1830s, officials in a rapidly expanding New York City saw a need for a larger water supply. Major David Bates Douglass was appointed to perform engineering studies on the future Old Croton Aqueduct in March 1833. Douglass made estimates for the new aqueduct in 1833–1834 and John Martineau performed a separate study in 1834. Both found the proposed route, which ran through the present-day park, to be okay. Thus, in 1837, construction started on the Aqueduct, which ran from the Croton River upstate to the New York Public Library Main Branch and Bryant Park in midtown Manhattan. The project was built by 3,000–4,000 laborers who completed the entire aqueduct in five years. The aqueduct's builders constructed a gatehouse within the present-day park to provide access to the aqueduct's interior. The old aqueduct was supplemented by the New Croton Aqueduct in 1890, which also ran through the park. The Old Croton Aqueduct was in use until 1955, though the part that ran through the park was closed down in 1897 after the new aqueduct was connected to the Jerome Park Reservoir. Planning In 1876, Frederick Law Olmsted was hired to survey the Bronx and map out streets based on the local geography. Olmsted noted the natural beauty of the Van Cortlandt estate, comparing it to Central Park which he designed, and recommended the city purchase the property. Around the same time, New York Herald editor John Mullaly pushed for the creation of parks in New York City, particularly lauding the Van Cortlandt and Pell families' properties in the western and eastern Bronx respectively. He formed the New York Park Association in November 1881. There were objections to the system, which would apparently be too far from Manhattan, in addition to precluding development on the site. However, newspapers and prominent lobbyists, who supported such a park system, were able to petition the bill into the New