Before doing anything else, Jack slipped back into the water, swam back through the sump, retrieved his boots and clothes, and then returned to the glowing cavern. He got dressed and then crept toward the light on hands and knees, trying but failing to control a violent shiver. The glint he'd noticed earlier turned out to come from a patch of clear crystals, the size of fingers, growing out of a wall – diamonds! He had entered into some place of fabulous riches. The walls were fuzzy with gems. Perhaps the light was green because it was shining through a giant emerald?