Charleston once had its own United States Post Office branch, and mail sent there bore the postal code "Staten Island 13, New York". The post office, located at 28 Androvette Street, was closed in 1949. While neighborhoods on Staten Island do not have universally agreed-upon boundaries, most observers today reckon Charleston as consisting of a triangle-shaped territory enclosed by Bloomingdale Road, the Richmond Parkway, and the Arthur Kill; this gives Charleston a slightly larger area than that which the former post office served—and by the current prevailing definition Charleston includes Sandy Ground, settled in 1833 by African Americans who had achieved freedom from slavery, most of whom came to the area from Maryland; remnants of the original settlement still exist.