Stiffness (as it is technically termed) has more to do with what is commonly called restiveness than most people imagine. A horse is asked to do something that calls upon him to bend or supple a joint in which, even in early youth, he is still far from supple. He cannot do it. The rider perseveres, and the horse resists. Whereas, when he is thoroughly suppled, he does not know how to disobey his rider (supposing the latter to know what he is about). If a lady, therefore, will pay close attention to the instruction of her master, she will discover that her horse will obey her more readily, and move with more ease to himself and her, when she applies her aids "smoothly" (without which the bending lesson cannot be done), than by the application of sudden or violent indications of her will. For it must be borne in mind that a double bridle is an instrument of great power in a horse's mouth, and that what may seem light handling to the uninitiated rider may be rough to the horse. A fair amount of practice, therefore, in the above-named exercise will have the effect of rendering a lady's hands remarkably true and steady; and, although the lesson may be a little trying to the patience, the pupil will find her reward in increased confidence and proficiency. For all practical purposes the "bending lesson" proper may be divided into two sections, namely, the "passage" and the "shoulder in," all other movements of the lesson being simply variations from the above named. The "half passage" may be looked upon as an introduction to the "full passage," but admits of being practised with facility at an increased pace at the trot or canter, and at the latter is a very elegant exercise. To begin with the "shoulder in." Let us suppose a horse standing parallel to the boards at the side of the school. To place him in the desired position it is necessary to bring his forehand in, so that his fore and hind legs are placed upon two lines, parallel to each other and to the boards, and then to bend his head inwards at the poll of the neck. No more correct idea, I believe, can be conveyed of the position than that given in the "Aid Book," which furnishes the following answer to the question, How should a horse be placed in "shoulder in"? "Ans.: When a horse is properly bent in 'shoulder in,' the whole body from head to croup is curved; the shoulders leading, fore and hind feet moving on two lines parallel to each other, hind feet one yard from the boards." Again. "Q. What are the aids for working this lesson?--A. On the word 'right or left shoulder in,' the horse's forehand is brought in by a double feeling of the inward rein, the outward leg closed, so as to bring the horse's hind feet one yard from the boards."