eleven o’clock
`` Mr. Dexter answered , in his quick , off-hand way of speaking , ` Not I. I know nothing about her . ' `` Then I advanced , and , begging pardon for intruding , I mentioned to Mr. Macallan the difficulty I was in about going back or not to his wife 's room without waiting until she rang for me . Before he could advise me in the matter , the footman made his appearance and informed me that Mrs. Macallan 's bell was then ringing -- and ringing violently . `` It was then close on eleven o'clock . As fast as I could mount the stairs I hastened back to the bedroom . `` Before I opened the door I heard Mrs. Macallan groaning . She was in dreadful pain ; feeling a burning heat in the stomach and in the throat , together with the same sickness which had troubled her in the early morning .