She stopped the horses, and Baker, a very completely-got-up groom of some forty years of age, who sat behind, got down and put the impetuous Dandy "in the bar," thereby changing the rein, so that the curb was brought to bear on him. 
She stopped the horses, and Baker, a very completely-got-up groom, put the impetuous Dandy in the bar to curb him.
