Read it through once

In babyhood Tom cuffed and banged and scratched Chambers unrebuked, and Chambers early learned that between meekly bearing it and resenting it, the advantage all lay with the former policy. The few times that his persecutions had moved him beyond control and made him fight back had cost him very dear at headquarters; not at the hands of Roxy, for if she ever went beyond scolding him sharply for "forgitt'n' who his young marster was," she at least never extended her punishment beyond a box on the ear. No, Percy Driscoll was the person. He told Chambers that under no provocation whatever was he privileged to lift his hand against his little master. Chambers overstepped the line three times, and got three such convincing canings from the man who was his father and didn't know it, that he took Tom's cruelties in all humility after that, and made no more experiments.