188. To lead out: The troopers being at stand to horse, to leave the stable or picket line, the instructor commands: LEAD OUT.
Each trooper, holding his right hand well up and firm, leads his horse, without looking at him, to the place designated by the instructor.
189. Upon entering the riding hall or inclosure the instructor disposes the troopers upon a line at intervals of 3 yards, the troopers at stand to horse, the horses correctly disposed and perpendicular to the line of troopers.
A horse is correctly disposed when he stands squarely on all four feet, having his head, neck, and body in line.
190. Stirrups: The stirrups are properly adjusted when, the trooper being properly seated with the feet removed from the stirrups and the legs falling naturally, the tread of the stirrups is about 1 inch above the top of the heel of the shoe.
The stirrups should bear only the weight of the lower leg; about one-third of the foot should be inserted in the stirrup, so that the ball of the foot rests on the tread, the heel lower than the toe.
The flat of the stirrup strap should rest against the leg of the mounted trooper. To accomplish this the trooper's toe should be so inserted in the stirrup as to place the front branch of the latter on the outside. By the front branch of the stirrup is meant the forward branch as the stirrup hangs before the trooper mounts.
Placing too much weight on the stirrup disturbs the seat and contracts the leg, hindering it's freedom of action.
If the toe is not inserted far enough the trooper risks losing his stirrup; if inserted too far suppleness is diminished.
The heel is carried naturally lower than the toe if the ankle joint is not rigid.