about two o'clock
He went to bed , but not to sleep . It was no part of Sir Jee 's programme to sleep . He intended to listen , and he did listen . And about two o'clock , precisely the hour which William Smith had indicated , he fancied he heard muffled and discreet noises . Then he was sure that he heard them . William Smith had kept his word . Then the noises ceased for a period , and then they recommenced .