eleven o'clock
`` I was not . I spent the entire evening in my own room . '' `` When did you again see Mr. Mainwaring ? '' `` Not until after eleven o'clock . I had come down for a smoke in the grounds outside and met Mr. Mainwaring in the lower hall on the way to his rooms . He asked me to come to his library before retiring , as he wished to give some final directions for the next day . About half an hour later I went to the library door , but hearing loud and angry talk within , I waited in the hall some fifteen or twenty minutes until I knew Mr. Mainwaring was alone .