In 1786, John Powell purchased Roe's parcel for 1,685 pounds, 6 shillings, and 8 pence. It has been reported that Roe lost his lands for his allegiance to the crown during the American War of Independence. Powell thereafter built a home and the cove was renamed "Powell's Cove", the name it bears today. During the 19th century, some of Powell's land passed into the hands of Harry Genet, a member of the Tammany Hall, New York City's infamous political machine. Powell's house was destroyed by fire in the 1890s.