I began to worry about him. He was strong and healthy, but a man must eat in order to live. For the next three days he ate nothing. At every meal the food lay untouched on the plate in front of him. He did not look at the food, or at us. He seemed to be looking at something quite close to him, something we could not see. His fierce black eyes followed it with such eager interest that he sometimes stopped breathing for as much as half a minute. 去书内