"It is just wonderful, Rhoda," she told her friend. "I shall never cease to marvel at it."

"It is worth getting up in the morning to see," agreed Rhoda, smiling. "There! See yonder?"

The level rays of the sun touched up the edge of the plain toward which they were headed. Here the broken rocks of the foothills joined the lush grass of the valley. On a boulder, outlined clearly against the background of the hill, stood a beautiful creature which, in the early light, seemed taller and far more noble looking than any ordinary horse.

"Oh!" gasped Nan, "is that the outlaw?"

The distant horse stretched his neck gracefully and blew another shrill call. He was headed toward the herd which was now being urged into the valley by the punchers. The horse whistled again and again.

"What a beautiful creature!" murmured Nan. "Oh, Rhoda! can't we catch him?"

"That's the fellow," said the Western girl. "They have been trying to rope him for three seasons. But nobody has ever been able to get near enough to him yet. He is not a native horse, either."

"What do you mean by that?" asked Walter curiously.

"You know, horses ran wild in this country when the Spanish first came in. These were of the mustang breed. The Indian pony—the cayuse—was found up in Utah and Idaho. Horse-breeders down here have bought Morgan sires and other blooded stock to run with the mustangs.

"That fellow yonder was bought by Mr. Duranger, an Englishman, who owned the Long Bow. The horse got away five years ago and ran off with the wild herd, and now he is the wildest of the bunch. And swift!"