four o'clock
But the superintendent did not want to laugh and asked him to postpone the conversation till they met in the school . No , John did not want to do that , for in the school both would have other views , and speak of something else . John 's debts increased and so did his work . He was in the school from eight till one ; then he ate his dinner and went to give his private lessons within half-an-hour , arriving out of breath , with food half digested , and sleepy ; then he taught till four o'clock going out afterwards to give more lessons in the Nordtullsgata ; he returned to his girl pupils in the evening , and then read far into the night for his examination after ten hours ' teaching . That was over-work . The pupil thinks his work hard , but he is only the carriage while the teacher is the horse . Teaching is decidedly harder than standing by a screw or the crane of a machine , and equally monotonous .