JAN WILLEM van Artevelde claimed descent from William of Orange. He had no genealogy to prove it, but on Venus there was no one who could disprove it, either. Jan Willem van Artevelde smoked a clay pipe, which only a Dutchman can do properly, because the clay bit grates on less stubborn teeth. Jan needed all his Dutch stubbornness, and a good deal of pure physical strength besides, to maneuver the roach-flat groundcar across the tumbled terrain of Den Hoorn into the teeth of the howling gale tha