Washington believed in mules and in the inventory of live stock in his will made in 1799, mention is made of two covering jacks, three young ones, ten she asses, forty-two working mules, and fifteen younger ones. It was a much later period, however, before mules were extensively bred in the United States. With the exception of Royal Gift, it is likely that the jacks brought from Europe were rather inferior. But in 1832, Henry Clay imported two pure-blood Catalan asses, a jack and a jenny. They were landed in Maryland, and there the jenny had a foal. This foal was called Warrior. This jack was fifteen hands high, and he became a great ass progenitor in Kentucky. The jennies there at that time were not well bred, but mongrels, mostly a light shade of blue, with gray, buff and grizzly hair, nearly as stiff as hog bristles, generally with a colored stripe across the shoulders and down the back, ewe-necked, flat in the rib, low carriage, and heavy headed, entirely destitute of any good quality except hardihood and ability to get a living where any other animal, save a goat, would have starved to death. With such jennies began the first effort to improve the race in Kentucky, and they flocked to Warrior in droves. He seemed to cross advantageously with them, just as the Cashmere goat crosses on the common hairy goat. His progeny seemed rapidly to lose the leading traits of their dams, and to inherit in a remarkable degree the color and outward characteristics of their sire. Four years later Dr. Davis imported in South Carolina another Catalan jack. He was 16 hands high and of great weight. This jack, Mammoth, was mated to the young Warrior jennies then just maturing, thus making the second cross of pure blood, and upon these two crosses rest to-day the breeding of the race of jacks known throughout the United States as the Kentucky Jack. These Kentucky jacks are still popular, and last year the British Government bought a number of them to take to India. Mr. J. L. Jones, of Columbia, Tennessee, is a recognized authority on mule breeding, and I prefer to give my readers his counsel in a matter with which he is better acquainted than I am. He says: