twelve o'clock
For two years she lived in this house alone night after night with the prisoner , and nothing happened . At last the nephew who was to inherit her wealth suddenly returned from the other end of the world . That night she met her death . ` At twelve o'clock her companion , who suffered from sleeplessness , went out for a long walk . Hardly had she closed the door behind her than the murderer stole up to it and made his way in . Probably he had a latchkey . We know that Miss Owen had mislaid hers .