That Ten Pound Island Light is an historic lighthouse in Gloucester Harbor that was built in 1881 and added to the National Register of Historic Places in 1988? Common lore says Ten Pound Island got its name from the amount of money the local Indians received from the early settlers for the property. Cape Ann historian, Joseph Garland, believed it was more likely named for the number of sheep pens (also known as pounds) on the island.
The actual light is 30 feet high with a focal plane of 57 feet above Mean High Water. The island is open to private boaters, but there is no landing facility except a small sandy beach. The lighthouse is not open to the public and is best seen by boat. It is an active U.S. Coast Guard aid to navigation, with the grounds managed by the City of Gloucester.