nine o'clock
But now I must run away . I have an appointment with my dentist at three . It is very good of you to ask Nan to dinner to-night , and I 'm doubly glad it happens as it does , for she would have to dine alone if she stayed at home , for I have to go out of town on business and can not get back tonight . Delia will call for Nan at nine o'clock . Good-bye , and have a pleasant evening ! '' and she caught up her satchel and was off in a twinkling . But after she had let herself out of the front door she came back and called Nan to the head of the stairs .