four o'clock
retorted Gwen . `` Then it 's time you learnt . Miss Roscoe will have to hear about this . Report yourself in the study at four o'clock , and go at once to your desk and begin your preparation . Put that paper bag on the mantelpiece , I ca n't allow you to keep it . '' Miss Trent sat down on Miss Douglas 's vacant chair , evidently with the intention of staying in the room to act Gorgon . Gwen walked to her desk in the depths of humiliation .