nearly five o’clock
`` Why , then you must have been asleep after all , in spite of your pain , '' said Muller with a smile , as he walked along beside the man back to the place from which he had just come . The old man shook his head . `` No , I tell you I did n't close an eye all night . I went to bed at half-past nine and I smoked two pipes before I put out the light , and then I heard every hour strike all night long and it was n't until nearly five o'clock , when it was almost dawn , that I dozed off a bit . '' `` Then it is astonishing that you did n't hear anything ! '' `` Sure it 's astonishing ! But it 's still more astonishing that my dog Sultan did n't hear anything .