Horses usually gallop on the right foot, in the same manner as they carry the fore right leg in walking and trotting; they also throw up the dirt in galloping first with the right fore leg, which is more advanced than the left; and the right hind leg, which follows immediately the right fore one, is also more advanced than the left hind leg, from whence it results, that the left leg, which supports all the weight, and forces forwards the others, is the most fatigued; for this reason it would be right to learn horses to gallop alternately on the left and right legs, as they would then bear much longer this violent motion; this is done in the riding-schools, but, perhaps for no other reason than in traversing a circle, the centre of which is sometimes on the right and sometimes to the left, the rider is compelled to change hands. In walking the horse almost scrapes the ground with his feet; in trotting they are somewhat raised; and in galloping they are lifted up still higher. The walk ought to be quick, light, and sure; the trot should be firm, quick, and equally sustained, and the hind feet ought to press forward the fore ones. The horse, in this pace should carry his head high, and keep his body, straight, for if the haunches rise and fall alternately at each motion, and if the crupper moves up and down, and the horse rocks himself, he is too weak for this motion. If he throws out his fore legs it is another fault; the fore legs should tread in a line with the hind ones, and always efface their tracks. When one of the hind legs is thrown forwards, if the fore leg of the same side rests too long, the motion becomes uneasy from this resistance, and it is for this reason that the interval between the two beats of the trot should be short; but, be it ever so short, this resistance is sufficient to make this pace more uneasy than walking or galloping. The spring of the houghs contributes as much to the motion of galloping, as that of the loins; whilst the loins use their utmost efforts to raise and push forward the hinder parts, the spring of the hough, breaks the stroke, and lessens the shock: thus, the more pliant and strong are the spring of their houghs, the more gentle and rapid is their motion in galloping.