'Now I trust you,' he said to Jacopo. 'Follow the length of five miles
over the pass: if you don't see me then, you have your liberty, tongue
and all.'

With that he doubled his arms and set forth at a steady run, leaving his
companions to speculate on his powers of endurance. They did so
complacently enough, until Jacopo backed him for a distance and Johann
betted against him, when behold them at intervals taking a sharp trot to
keep him in view.