In Chapter 5, the men search the island while Cargunka, Gell, Durritt, and the ship's carpenter investigate the wreck; Durritt wears a diving suit. During his dive, Durritt's lifeline is jerked violently, and Cargunka swims into the wrecked ship, without a diving suit, to aid the man. Cargunka rescues him, but there seems to be no explanation as to how the became twisted around an interior door-handle, or for the blow he received to the back of the neck, which knocked him unconscious.