Rulers of Kings by Gertrude Atherton

Mr. Abbott sat in the rocking-chair by the hot stove regarding his son with his dreamy far-seeing eyes. For the first time Fessenden wondered who and what his father was. This man was like no one in the books he had read, like no one in the Adirondacks. He was a boy of direct methods, and was about to ask for information when his father spoke.

"I am more gratified at your physical development than you will ever know, my son," said Mr. Abbott, tenderly. "When I brought you here you were fragile and undersized; it was thought that your chance of becoming a strong man, or of reaching manhood at all, was perhaps two in ten. But I knew the magic of the mountains; I made my experiment, and I have succeeded. There are other things I wish to say to you, however, so sit down and listen attentively."