What does Karana find inside the cave?

Black Cave is a sea cave that is only accessible when the tide is low. Karana has never explored it, and decides to venture in with her canoe after seeing a hawk fly out of it. The cave is large and very dark, and she is shocked to find a human skeleton perched on a ledge inside. She also finds some disturbing dolls with bright black eyes. Although Karana knows these are artifacts from her ancestors, she is frightened nevertheless.