nine o'clock
I knew girls in college who took strychnine to keep themselves going through examinations or other occasions of great physical strain , and they have suffered for it ever since . If you are doing so much that you ca n't ` keep up ' any other way than by taking powerful medicines , it is time you ` kept down . ' Fresh air and regular sleep are all the tonic you need . You stay away from that typewriter for a whole week and go to bed at nine o'clock every night . I 'm coming down to tuck you in . Now remember ! '' And with this solemn warning Nyoda left her .