About ten o'clock
exclaimed the tutor . `` Well , go on . At what time from starting ! '' `` About ten o'clock , sir . '' `` Better and better , '' said the tutor sarcastically . `` Now , will you kindly explain -- no , no , do n't look at your figures -- Will you kindly explain how you arrived at this sapient conclusion ? '' Dexter hesitated , and shifted one foot over the other .