“One more thought, then,” Dr. Clay said. “Let’s suppose it is evidence. Let’s suppose that there is no mystery here; let’s suppose that the guy who did all this never left the island and they just didn’t find him. And let’s suppose that he’s the one who made the hoofprints in the ground. He could have seen our boat coming—I bet you could see that for miles—and he’d know that we didn’t have a good view of the end of the island, so he sets up the markings on the beach that he knows we can’t miss. Let’s suppose that inside the box is—”