When Livesey leaves in search of Ben Gunn, Jim runs away without permission and finds Gunn's homemade boat. After dark, he goes out and cuts the ship adrift. The two pirates on board, Hands and O'Brien, interrupt their drunken quarrel to run on deck, but the ship — with Jim's boat in her wake — is swept out to sea on the ebb tide. Exhausted, Jim falls asleep in the boat and wakens the next morning, bobbing along on the west coast of the island, carried by a northerly current. Eventually, he encounters the ship, which seems deserted, but getting on board, he finds O'Brien dead and Hands badly wounded. He and Hands agree that they will beach the ship at an inlet on the northern coast of the island. But as the ship is finally beached, Hands attempts to kill Jim, and Jim shoots and kills him. Then, after securing the ship as well as he can, he goes back ashore and heads for the stockade. Once there, in utter darkness, he enters the blockhouse — to be greeted by Silver and the remaining five mutineers, who have somehow taken over the stockade in his absence.
Silver and the others argue about whether to kill Jim, and Silver talks them down. He tells Jim that, when everyone found the ship was gone, the captain's party agreed to a treaty whereby they gave up the stockade and the map. In the morning Dr. Livesey arrives to treat the wounded and sick pirates, and tells Silver to look out for trouble when they find the site of the treasure. After he leaves, Silver and the others set out with the map, taking Jim along. Eventually they find the treasure cache — empty. Two of the pirates charge at Silver and Jim, but are shot down by Livesey, Gray, and Ben Gunn, from ambush. The other three run away, and Livesey explains that Gunn has long ago found the treasure and taken it to his cave.
In the next few days they load the treasure onto the ship, abandon the three remaining mutineers (with supplies and ammunition) and sail away. At their first port, where they will sign on more crew, Silver steals a bag of money and escapes. The rest sail back to Bristol and divide up the treasure. Jim says there is more left on the island, but he for one will not undertake another voyage to recover it.
