They have uncovered human remains. The jungle has done its work and practically nothing is left but bones, but the smell, and the legions of ants, tell him that the corpse is a fairly recent one. He grabs a shovel from one of the workers and pulls up a scoop of dirt and carries it over to the river, dripping tangles of ants. He lowers it carefully into the running water. The dirt dissolves into a brown trail in the river and the skull is soon revealed: the dome of the head, the eye sockets still not entirely empty, the nasal bone with some fragments of cartilage still attached, and finally the jaws, pocked with old abcesses and missing most of their teeth, except for one gold tooth in the middle. The current turns the skull over slowly, as if Lieutenant Ninomiya is hiding his face in shame, and Goto Dengo sees a neat hole punched through the base of the skull.