The next point that presents itself is, On what sort of animal would it be most advisable to cross our thoroughbred or Arab? In the absence of any long-continued series of experiments, which alone could have led to definite results in the production of a fixed type of pony, or a stamp of pony worth trying to perpetuate as a fixed type, the answer must be conjectural; we can only deal in probabilities. We may not be able to establish a breed of which a specimen exceeding 14 hands 2 inches shall be something quite abnormal; on the contrary, the whole course of experience in breeding horses of whatever class goes to prove the impossibility of ensuring that the progeny of any given sire and dam shall attain to a specified height, neither less nor more. Nevertheless, there seems no reason why skill and care in breeding should not in course of time produce an animal whose _average_ height at maturity shall be the desired 14 hands 2 inches. There are, it must be repeated, several essential points to be kept clearly in view in our endeavour to develop a Polo Pony on the foundation of Thoroughbred or Arab blood. We have primarily to guard against the tendency to exceed the regulation height, and we must seek means to obtain the bone and stamina which are so necessary. Our Forest and Moorland mares suggest themselves as the material at once suitable for the purpose and easily obtainable. In these ponies we have the small size which will furnish the needful corrective to overgrowth, and we have also that hardiness of constitution and soundness of limb which are invaluable in laying the foundation of our proposed breed of 14-hands 2-inch ponies. Many attempts have been made from time to time to improve these breeds; indeed, some have been so frequently crossed with outside blood that the purity of the strain has nearly disappeared; this is believed to be the case with the Dartmoor pony. At the same time these infusions of blood have done nothing to impair the value of the ponies in respect of their intrinsic qualities of hardiness and soundness.