plus , this soup wo n't be ready for another ten minutes . '' he bent down and put the sandwich on a rock . `` did i mention she works at a dress shop ? no , we keep going , i replied him . `` you took a terrible blow to the head . `` time travel plays the very devil with one 's nerves , does n't it ? here is a letter from new york . i can see your old office building from its window . he felt her sadness beating at him . 