one o'clock
First , there is Denson in his office ; I can find nothing of any American visitor , and I am convinced that he is a total fiction , either of Denson 's or Samuel and Denson together . Denson is in his office . To him comes Samuel . Neither leaves the place till Samuel comes down at a quarter-past one o'clock . I told you he sent some sort of message . The housekeeper tells me that he called a passing commissionaire and gave him something , though whether it was a telegram or a note he did not see ; nor does he know the commissionaire , nor his number -- though he could easily be found if it became necessary , no doubt . Samuel sends the message , and waits on the steps , watching , in an agitated manner -LRB- as would be natural , perhaps , in a man engaged in an anxious and ticklish piece of illegality -RRB- for an hour , when this mysterious brougham appears .