"Well, I think he found some secret passage here. I believe he knows how to enter and leave this cavern without being seen. This whole ridge, you know, is honeycombed with caverns and tunnels. I have been told," the boy continued, "that the gorge and the valley to the east formed the basin for a great lake, hundreds of years ago, and that the water seeped through the limestone rock until there wasn't much left of it in some places. There are certainly plenty of caves here!"