six o'clock
The doctor felt sure that the negro had robbed him , and was on his way to Canada ; but in this he was mistaken . Sam had gone to the city to attend a ball , and had decked himself out in his master 's best suit . The physician returned before morning , and again retired to bed but with little hope of sleep , for his thoughts were with his servant and horse . At six o'clock , in walked Sam with his master 's clothes , and the boots neatly blacked . The watch was placed on the shelf , and the hat in its place . Sam had not met any of the servants , and was therefore entirely ignorant of what had occurred during his absence . `` What have you been about , sir , and where was you last night when I was called ? ''