two p.m.
At the stroke of two he was again knocking at his pupils ' door . But no answer came . John had gone away somewhere for indefinite hours and the door was locked . So Oscar wrote : `` Called , two p.m. , '' on a scrap of envelope , signed his name , and put it through the letter-slit . It crossed his mind to hunt other pupils for his vacant time , but he decided against this at once , and returned to his own room . Three o'clock found him back at the door , knocking scrupulously , The idea of performing his side of the contract , of tendering his goods and standing ready at all times to deliver them , was in his commercially mature mind . This time he had brought a neat piece of paper with him , and wrote upon it , `` Called , three P.M. , '' and signed it as before , and departed to his room with a sense of fulfilled obligations .