Crupper: a leather strap looped under a horse's tail and attached to a harness or saddle to keep it from slipping forward.
牵鞍兜带：穿过马尾下面的一皮革圈套，用来扣紧马具或马鞍以防止它向前滑动。
3
Now when he met him the man who then seemed already extremely weary had requested him to take him on his crupper to which the fishmonger had made no reply except by redoubling his gait.