by the time he reached the safety of the house , his heart was racing and he was short of breath . is n't it connected to salt or something ? '' `` is that why i was sent from this place ? he had a sister who died of polio when she was really young . they could spend days searching and still not find what they need . `` you would n't be in your present condition if you had n't been stupid and tried to walk away from me . her friend tilted her head as she looked back . 