Sourcery (Discworld 5) When last seen, the singularly inept wizard Rincewind had fallen off the edge of the world Now ain, and this tie But that&39;s not all Once upon a tihth son as, of course, a wizard As if that wasn&39;t coh, said wizard then had seven sons And then he had an eighth son -- a wizard squared (that&39;s all the ic -- a sorcerer