nine o’clock
But at last Rogojin rose , staring at me as intently as ever , but not smiling any longer , -- and walking very softly , almost on tip-toes , to the door , he opened it , went out , and shut it behind him . `` I did not rise from my bed , and I do n't know how long I lay with my eyes open , thinking . I do n't know what I thought about , nor how I fell asleep or became insensible ; but I awoke next morning after nine o'clock when they knocked at my door . My general orders are that if I do n't open the door and call , by nine o'clock , Matreona is to come and bring my tea . When I now opened the door to her , the thought suddenly struck me -- how could he have come in , since the door was locked ? I made inquiries and found that Rogojin himself could not possibly have come in , because all our doors were locked for the night . `` Well , this strange circumstance -- which I have described with so much detail -- was the ultimate cause which led me to taking my final determination .