six o'clock
She could get the key from the janitor , who lived not far from her own home . It seemed a fairly feasible plan , and , though she would lose her evening 's study , she determined to go to bed early , and rise at daybreak to go for the book . `` I 'll write a note to mother , '' she thought , `` telling her all about it , and I 'll leave it on her dressing-table . Then , when she hears me prowling out at six o'clock to-morrow morning , she 'll know what I 'm up to . '' The notion of an early morning adventure was rather attractive , but suddenly Marjorie thought that she might not be able to get the key from the janitor so early as that . `` Perhaps Mr. Cobb does n't get up until seven or later , and I ca n't wait till then , '' she pondered . `` I 've a good notion to go for that key to-night .