And this jewelry was not just discovered in archeological digs in these various sites. There's evidence of their jewelry as far as Mesopotamia and digs there. And they believe that there was actually a very active maritime trade network between these areas. There's jewelry discovered in these Indus Valley civilizations that were based on shells from the Arabian Peninsula. They have materials from China, so there's materials from other parts of India. So once again, a very, very extensive trade network. These civilizations would have known about them.