To obtain the change of leg during the fourth period, we should give the signal to the horse during the second period, when the diagonal is in support. When cantering to the right, the effect of the spur, at the moment when the left diagonal is in support, will be a vigorous straightening of the off hock, which will forcibly send the near shoulder in advance of the off shoulder when the horse is in the air.

The near hind leg will go in advance of the off hind leg all the more easily, because it is off the ground when the off hock gives its push. Under these conditions, after the spur has touched the horse during the second period, the third period (support by the off fore) loses the greater part of its impulse in the stride, and will be accentuated only as much as the equilibrium may require, because it is the off hock which has given the increased propulsion necessary for a change of leg.

Everyone can now understand the meaning of change of leg in the air.

The reversed indications are used for changing from the near fore to the off fore.

In this chapter I have spoken of changes of leg only from an ordinary point of view. Later on I will discuss this subject with respect to high school work.

THE HACK.

I will not try to describe the proper type of hack, because every riding man or woman has his or her own ideal, which

" As Baron de Vaux knows many riding masters whom he favourably criticises, I would like to get one of them to accept my challenge.

" I am ready to accept my adversary's conditions as regards ground and length of course. He can also fix the stake, which should go to a public charity.

" This will be a good business for the poor, if not for riding. Ten thousand francs, for instance, will give them a great deal of pleasure.

" I am, Sir,

" Your most obedient servant,

" JAMES FILLIS."