At one time the pacing horse Blue Bull stood at the head of all sires of trotters in this country, and it is not known or believed that he possessed a single drop of trotting blood. He was a very fast pacer and could do nothing else, and a large percentage of the mares bred to him were pacers, and practically all the others had more or less pacing blood, but his great roll of trotters in the 2:30 list was the wonder of all horsemen of that period. Certainly the average of the elements in his inheritance would place him very low in theory, but in practice he struck back to some ancestor that was strongly prepotent. The trouble in his case is practically the same as in all other pacing stallions—the inheritance traces back to a period more remote than any of the fast trotting stallions, but at intervals it has been neglected and not developed until it has become weak and uncertain from lack of use. The same may be said of the Copperbottoms, Corbeaus, Flaxtails, Hiatogas, Davy Crockets, Pilots, Rainbows, Redbucks, St. Clairs, Tippoos, and Tom Hals, as well as other heads of minor families that will be considered in their proper places. The changes that have been wrought in the status of the pacer have been truly wonderful. Instead of being hidden away as an outcast and a disgrace to the family, condemned to a life of inferiority and drudgery, he has been brought out and exhibited to the public as a son and heir and the equal of the best. In looking back over the trotting records of twenty years ago, any one will be surprised to observe that at all the leading meetings of the whole country there were no pacing contests. Occasionally at the minor and local meetings of the middle Western States, a pacing contest would be given for a small purse, in which local and obscure horses only would be engaged. Very naturally the owners of pacing horses protested against this practical exclusion of their favorites from the trotting meetings, and employed all their energies in begging for admission. When they began to be really clamorous the managers of trotting tracks argued that there could be no profit to them in opening pacing contests, for nobody cared about seeing a pacing match, that the entries would not fill, and especially that there would be no betting, that, consequently, the pool-sellers would have nothing to divide with the management. As the receipts for pool-selling and all other gambling privileges were making the track managers rich, they were very slow about admitting an untried element that might diminish their profits. But gradually and patiently the pacers worked their way into the exclusive circle, and when they appeared everybody, especially in the Eastern States, was surprised to see what excellent horses they were and the terrific speed they showed. Instead of the typical pacer, as formed in the popular mind, with the low head, bull neck, low croup, hairy legs, exuberant mane and tail, and generally “Canuck” all over, that would stop