three o'clock
In all the classes I attended , I made some kind of blunder . I realised that the profession of teaching not quite so easy a calling as might have appeared . My teaching for the day was finished but I could not get away . I had to wait alone until three o'clock . I understood that at three o'clock the students of my classes would finish cleaning up the rooms and report to me , whereupon I would go over the rooms . Then I would run through the students ' roll , and then be free to go home . Outrageous , indeed , to keep on chained to the school , staring at the empty space when he had nothing more to do , even though he was `` bought '' by a salary !