Siena College
Postcard from NY Heritage Digital Colllection
Postcard from NY Heritage Digital Collection
Postcard from NY Heritage Digital Collection
Engraving of Washington's headquarters via Wikipedia
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A New School Needed. (1897, November 23). Newburgh Register.
Hudson River Valley: Heritage sites. Maurice D. Hinchey Hudson River Valley National Heritage Area, In Partnership with the National Park Service. (n.d.).
Washington's headquarters historical marker. Historical Marker. (2021, August 8). Retrieved November 30, 2021, from hmbd.org.
Washington's headquarters, Newburgh, N. Y. Home. (n.d.).
Washington's Headquarters State Historic Site. Newburgh, NY 12551. (n.d.). Retrieved November 30, 2021, from I love NY