seven o'clock
Now , as you know , I am a sound sleeper . I am asleep five minutes after my head touches the pillow , and even a thunder-storm during the night would scarcely waken me . On some accounts this is an advantage , but , as you will see , it turned out unluckily for me on the night I am speaking of . I awoke at the usual time -- seven o'clock -- and on opening my eyes I saw at once that my young assistant was not in the room . This gave me no uneasiness . I presumed that he had waked after a good night 's sleep and was taking a morning walk . I rose from the bed , put on my clothes leisurely , and it was only after I was completely dressed that I felt in my pocket for my wallet .