People like ourselves may see nothing wondrous in writing, but our anthropologists know how strange and magical it appears to a purely oral people - a conversation with no one and yet with everyone. What could be stranger than the silence one encounters when addressing a question to a text? What could be more metaphysically puzzling than addressing an unseen audience, as every writer of books must do? And correcting oneself because one knows that an unknown reader will disapprove or misunderstand?