Read it through once

The next day--that is to say, on the 4th of September--something occurred which profoundly impressed Roxana. Mr. Driscoll missed another small sum of money--which is a way of saying that this was not a new thing, but had happened before. In truth it had happened three times before. Driscoll's patience was exhausted. He was a fairly humane man toward slaves and other animals; he was an exceedingly humane man toward the erring of his own race. Theft he could not abide, and plainly there was a thief in his house. Necessarily the thief must be one of his negroes. Sharp measures must be taken. He called his servants before him. There were three of these, besides Roxy: a man, a woman, and a boy twelve years old. They were not related. Mr. Driscoll said: