The boy jerked his head towards the horses.

"Bay 'orse there, under the tree," he said casually; and added with a grin, "Look out 'e don't sling yer orf, mind."

"Right-oh," said Dick, grinning. He walked towards the horses; and it never occurred to him that the "bay 'orse under the tree" meant old Sergeant. That ornament to his species, with drooping head and slumbrous eye, was probably waiting to go on a station errand; he looked like it. But the boy's description equally applied to Agility, and Dick went over to him without hesitation.

The stirrups were too long, and he shortened them while Agility tried to walk round himself in a way that made it sufficiently clear that he was very fresh. He was a light bay, half thorough-bred; not more than fifteen hands in height and very compact. At the moment he was like a restless mass of steel springs enclosed in a satin skin. Dick slipped off his halter and talked to him for a moment, patting his neck. Then he put the reins gently over his head and was in the saddle with a movement so quick that the horse had not time to realise it.

It was just at that moment that Mr. Warner and Mr. Lester, with Merle beside them, came strolling across from the house. The big man was in the midst of a sentence when his eye fell on the line of horses, and he broke off with a startled exclamation.

"Good God—is O'Mara mad! That horse will throw the boy!"

"Where?—throw Dick?" Mr. Lester gave a little laugh. "Oh, I don't think so."

Mr. Warner did not hear him. He broke into a run, calling agitatedly:

"Steady, Dick—hold him! Let me get to his head!"

The words were lost on Dick. Agility, feeling the light weight on his back, was dancing sideways, giving playful little kicks and trying to get his head down. Dick's hands gave to the strain on the bit to a certain point; then they were steel, and the horse knew it. He reared suddenly, striking out with his forefeet, so nearly upright that even Mr. Lester, who had no nerves where his son's horsemanship was concerned, caught his breath. Agility came down, with all his hoofs firmly planted; stood motionless for a moment, and then began to buck.