During the attack on the fort, Captain Smallet was injured, and the pirates poisoned the well. Jim secretly leaves the fort to fetch water, but is prevented from doing so by Captain Silver. But the plan to dry out the fort fails when heavy rain sets in and gives the people in the fort water for several days. Silver comes up with a new plan: He takes the Hispaniola very close to the island, past the coral reefs, and starts shelling the fort with his cannons...