The Doctor knew a good many things besides how to drop tinctures and shake out powders. Thus, he knew a horse, and, what is harder to understand, a horse-dealer, and was a match for him. He knew what a nervous woman is, and how to manage her. He could tell at a glance when she is in that condition of unstable equilibrium in which a rough word is like a blow to her, and the touch of unmagnetized fingers reverses all her nervous currents. It is not everybody that enters into the soul of Mozart's or Beethoven's harmonies; and there are vital symphonies in B flat, and other low, sad keys, which a doctor may know as little of as a hurdy-gurdy player of the essence of those divine musical mysteries. The Doctor knew the difference between what men say and what they mean as well as most people. When he was listening to common talk, he was in the habit of looking over his spectacles; if he lifted his head so as to look through them at the person talking, he was busier with that person's thoughts than with his words. Jefferson Buck was not bold enough to confront the Doctor with Miss Susy's question, for he did not look as if he were in the mood to answer queries put by curious young people. His eyes were fixed steadily on the dark girl, every movement of whom he seemed to follow. She was, indeed, an apparition of wild beauty, so unlike the girls about her that it seemed nothing more than natural, that, when she moved, the groups should part to let her pass through them, and that she should carry the centre of all looks and thoughts with her. She was dressed to please her own fancy, evidently, with small regard to the modes declared correct by the Rockland milliners and mantua-makers. Her heavy black hair lay in a braided coil, with a long gold pin shat through it like a javelin. Round her neck was a golden torque, a round, cord-like chain, such as the Gaols used to wear; the “Dying Gladiator” has it. Her dress was a grayish watered silk; her collar was pinned with a flashing diamond brooch, the stones looking as fresh as morning dew-drops, but the silver setting of the past generation; her arms were bare, round, but slender rather than large, in keeping with her lithe round figure. On her wrists she wore bracelets: one was a circlet of enamelled scales; the other looked as if it might have been Cleopatra's asp, with its body turned to gold and its eyes to emeralds. Her father--for Dudley Venner was her father--looked like a man of culture and breeding, but melancholy and with a distracted air, as one whose life had met some fatal cross or blight. He saluted hardly anybody except his entertainers and the Doctor. One would have said, to look at him, that he was not at the party by choice; and it was natural enough to think, with Susy Pettingill, that it must have been a freak of the dark girl's which brought him there, for he had the air of a shy and sad-hearted recluse.