five minutes to two
I was sleepy myself , and I got up and took a turn around the room every five minutes to be sure that I kept awake . That 's how I am so sure of the time , sir . '' * * * * * Dr. Bird nodded . `` At five minutes to two , just as I got up , I heard a noise outside like a big electric fan . It sounded like it came from directly overhead and I went to the window and looked out . I could n't see anything , although I could hear it pretty plainly , and then I heard a noise like something had fallen on the roof . Almost at the same time there came a sort of high-pitched whine , a good deal like the noise an electric motor makes when it is running at high speed .