QUOTES BY GUSTAV VON DREYHAUSEN
On Training the Young Horse

"I want the rider who is on a young horse that he is going to train to have the cavesson reins that are attached to the horse’s nose, and the two bridle reins separated in both hands, i.e. two reins in each hand, one cavesson rein and one bridle rein. But the curb reins have to be more slack than the cavesson reins, because the horse is not yet familiar with the bit. To the degree that the horse can be guided without the longe line that the trainer on the ground is holding, one removes the longe line altogether, so that the rider controls the horse himself with the cavesson and the bridle. He lets him taste the bit of the bridle more and more, without, however, dropping the cavesson reins, for fear of spoiling the mouth that is not yet accustomed to the bit. As I have said, the rider must have a tactful hand, and when he begins to feel that the horse obeys the bridle alone, he has to use it. "