M. Horace Hayes, Illustrated Horse Breaking
“ To my thinking, one great beauty in it—apart from its immense advantage of never giving the animal the chance of getting the upper hand, which he might easily do, were the rider in the saddle—is, that the breaker who employs it, can tell at any moment how his pupil is progressing, by his touch on the reins, and can, accordingly, with well-grounded confidence, use his own judgment in regulating the amount of instruction. ”
