Some tennager called him over as he stepped back out into the blistering heat.  "Jack," he automatically said when the kid introduced himself, but the stranger was already moving on.  He offered a folder with 'a message from his parent and a plane ticket.'  He looked squarely at the boy as soon as the speech was finished.  "I wouldn't expect there to be two people named Yawo Jackson, but apparently there are.  My father died three years ago; I watched him do it."  He held out the folder as if to return it.