"These sands are no longer free for you to pass. These people lay ancestral claim to the Dune Sea, and if you are to pass, a toll is to be paid to them. Any death dealt from the passing freighters will be returned ten-fold. Now go back to your syndicate and present these terms. Your lives are a gesture of our civility. Now walk. Single file, in the direction of the high sun. It will lead you to Anchorhead by sunset if you leave now."