William Cavendish may refer to: (wikipedia)
But my method of the pillar, as it throws the horse yet more upon the haunches, is still more effectual to this purpose, and besides always gives him the ply to the side he goes of.
Be always lavish of your caresses, and sparing in your corrections.
The horse's neck is between the two reins of the bridle, which both meet in the rider's hand.
Use gentle means before you come to extremity, and whatever lesson you work him, and never take above half his strength, nor ride him till he is weary, but a little at a time and often.
These are excellent lessons to break him, and make him light in hand: but nothing puts a horse so much upon his haunches, and consequently makes him so light in hand, as my new method of the pillar.
I would have you fasten instead of holding it, the rein that comes back to your hand to the pommel of the saddle, because it has the greater force.
No horse therefore is well dressed that is not light in hand; so that an easy and gentle bridle, but firm, is the chief secret to make a horse light.
But what for the generality I call a light or gentle hand, is at the same time as light as a feather, and yet firm, except in extraordinary cases.