General Washington's spies on Long Island and in New York

New York (N.Y.) -- History -- Revolution, 1775-1783, Washington, George, 1732-1799 -- Career in espionage, Spies -- New York (State) -- History -- 18th century, Espionage -- New York (State) -- History -- 18th century, United States -- History -- Revolution, 1775-1783 -- Secret service, New York (State) -- History -- Revolution, 1775-1783 -- Secret service, Long Island (N.Y.) -- History -- Revolution, 1775-1783