In chapter 17, while the doctor, squire, captain, and Redruth escape to the cabin and stockade, Israel Hand and his crew of pirates go onto the Hispaniola and start to shoot the Long Nine cannon at the small row boat containing the good hands.
During the 16th century, naval artillery was just being incorporated onto ships. These extremely heavy, and extremely powerful guns were placed near bottoms of ships because of the power of its after shot. During the 18th century, inventors and sailors started to come up with better designs and methods to use cannons. One of these newer firearms were the Long Nine that was used in Treasure Island.