Plan of the redoubts at Richmond on Staten Island, 30th October 1779. [1779] Map. Retrieved from the Library of Congress.
Plan of the redoubts at Richmond on Staten Island, 30th October 1779. [1779] Map. Retrieved from the Library of Congress, https://www.loc.gov/item/gm71000694. (Accessed June 28, 2016.)
Finding the Maryland 400 
