six
o'clock
Sit down and wait . I ca n't stop now . Do n't speak to me for fifteen minutes . I 'm finishing something that must go by the six o'clock mail . '' Molly sank into the depths of the nearest chair while the Professor 's pen scratched up and down monotonously . Not since the famous night of her Freshman year when she was locked in the cloisters had she been in the Professor 's sanctum , and she looked about her with much curiosity . `` I wish I had one just like it , '' she thought .