Quentin's reply was utterly non-verbal. He was not the sort of man that would make a threat and then not follow through upon it. So he starts to walk towards Harry fully intent on taking the man by the scruff of the neck and the back of his pants and bodily throwing him out of the doors of the bar. He had no more worry of the law in this matter than he had of Harry himself. He seriously doubted the constable would try to arrest a Marquis and Knight of the Realm on the word of a drunk.