He opened the door, and Vronsky went into the horsebox, dimly lighted by one little window. In the horsebox stood a dark bay mare, with a muzzle on, picking at the fresh straw with her hoofs. Looking round him in the twilight of the horsebox, Vronsky unconsciously took in once more in a comprehensive glance all the points of his favorite mare. Frou-Frou was a beast of medium size, not altogether free from reproach, from a breeder’s point of view. She was small-boned all over; though her chest was extremely prominent in front, it was narrow. Her hindquarters were a little drooping, and in her forelegs, and still more in her hind-legs, there was a noticeable curvature. The muscles of both hind- and forelegs were not very thick; but across her shoulders the mare was exceptionally broad, a peculiarity specially striking now that she was lean from training. The bones of her legs below the knees looked no thicker than a finger from in front, but were extraordinarily thick seen from the side. She looked altogether, except across the shoulders, as it were, pinched in at the sides and pressed out in depth. But she had in the highest degree the quality that makes all defects forgotten: that quality was blood