When a young lady is first put on horseback, I believe in anything that can give her confidence, and for this purpose the third crutch is admirable, because she finds a firm purchase between the crutch and the stirrup. As this hold, however, is apt to degenerate into a complete reliance on the third pommel, it is necessary in a more advanced stage of the lessons in equitation to use a saddle without any such support for the pupil. The third crutch, when forming part of a side-saddle, _should never be removed_, as is too frequently done by grooms for the purpose of cleaning the saddle. The crutch itself is so constructed as to screw into a socket in the tree. By constantly screwing and unscrewing it, the thread of the screw wears out; in fact, this will occur much sooner than would be supposed. The consequence is that, let the lady or her assistant turn the third crutch to what angle they may in order to suit the length and formation of the lady's leg, the crutch will not remain in its proper position, but is continually shifting, turning, and wobbling, to the great discomfort of the rider; nay, I have seen more than one case where the crutch has turned edgeways to the rider's leg, and caused severe pain and bruising of the delicate limb. Let it be a strict injunction then, to your groom, "Never unscrew the third crutch;" and if you find the support shifting in its socket, shift the groom as soon as possible, and send the saddle to the saddler to be firmly fixed in. Why saddlers should fit these supports to turn at all, I can see no good reason. Some men, it is true, say that in putting a lady on horseback it is necessary to turn the third crutch round, so as to prevent it from catching the skirt; but for my own part I could never find any necessity for this, or any difficulty in clearing a lady's skirt when lifting her to the saddle. In purchasing a side-saddle, I repeat, the greatest judgment is necessary as regards the third crutch; while it should be long enough to give a good purchase and be well padded, it should be but _slightly curved_. A crutch that forms a considerable segment of a circle is both inconvenient and dangerous--inconvenient because it is a support of this description (if any) that is in a lady's way in mounting, and dangerous because, if in the hunting field a horse should chance to fall with his fair rider, she would be unable to extricate herself from her fallen steed, inasmuch as the nearly half-circular crutch would completely pin her leg to the horse. It is, in fact, almost as dangerous as if a man were to strap himself to his saddle (which, by the way, I once saw a very determined hunting man do when suffering from weakness in one leg). He had no opportunity, however, of testing his experiment, as the master of the hounds very judiciously told him that, if he persevered, he (the master) would take the hounds home.