The limitations with which every man is born necessarily limited the ability to jaunte. Some could visualize magnificently and set the co-ordinates of their destination with precision, but lacked the power to get there. Others had the power but could not, so to speak, see where they were jaunting. And space set a final limitation, for no man had ever jaunted further than a thousand miles. He could work his way in jaunting jumps over land and water from Nome to Mexico, but no jump could exceed a thousand miles.