This is the story of one lost poem, two great rivers, and three remarkable lives -- all connected by a single drop of water. In the ruins of Nineveh, that ancient city of Mesopotamia, there lies hidden in the sand fragments of a long-forgotten poem, the Epic of Gilgamesh. In Victorian London, an extraordinary child is born at the edge of the dirt-black Thames. Arthur's only chance of escaping poverty is his brilliant memory. When his gift earns him...