four o'clock
Nothing could happen to her when Prince was with her . His first impulse was to follow her , but he repelled it , and he too sat down to think . Lassie whined uneasily , and he stroked her head absent-mindedly , and finally went out and tried to work . The hours dragged away , and by four o'clock he could stand it no longer . He went to the gateway . As he unfastened it , he saw her coming toward him , but she stopped and he joined her , and together they turned back to the boulder . He noticed that she was very white , and that her eyes looked as if she had not slept , but he only said , `` Have you thought ? ''