eleven o'clock
Then , one who was more daring than the rest exclaimed : `` It can not last ! It must come to an end ! '' And as the same kind of talk went on till night , Frederick was bored to death . Great was his surprise when , at eleven o'clock , he suddenly beheld Arnoux , who immediately explained that he had hurried back to set him at liberty , having disposed of his own business . The fact was that he had no business to transact . The whole thing was an invention to enable him to spend twenty-four hours alone with Rosanette . But the worthy Arnoux had placed too much confidence in his own powers , so that , now in the state of lassitude which was the result , he was seized with remorse .