midnight
I do n't believe that he slept two hours a night . Often , when I woke up , I 'd see him walking back and forth in the moonlight , humming softly to himself . There was almost a touch of madness in it all ; but I knew that Thornton was sane . One night -- our fourteenth down -- I awoke a little after midnight , and as usual looked about for Thornton . It was glorious night . There was a full moon over us , and with the lake at our feet , and the spruce and balsam forest on each side of us , the whole scene struck me as one of the most beautiful I had ever looked upon . When I came out of our tent , Thornton was not in sight .