As he was about to enter the woods at the base of the mountains, he saw a horse emerge from the trees, and come toward him at a rapid gallop.

His bridle was flying loose in the wind, and Johnny at first thought he was running away; but a second glance showed him that there was somebody on his back.
"Stampeded," thought Johnny.

"If I am laughed at, it will be some consolation to know that I am not alone in my misery." The rider of the stampeded horse was bent almost double; his feet were out of the stirrups, which were being thrown wildly about; both hands were holding fast to the horn of the saddle; his face was deadly pale, and, altogether, he presented the appearance of one who had been thoroughly alarmed.

Although he looked very unlike the dignified Arthur Vane, who had ridden so gayly over that road but a few moments before, Johnny recognized him at once; and the first thought that flashed through his mind was that something terrible had happened to Frank and Archie.
"What's the matter ?" asked Johnny, pulling up his horse with a jerk.
"Grizzly bears!" shouted Arthur, in reply, without attempting to check his headlong flight.
"Grizzly bears!" echoed Johnny, in dismay.

"And are you going off without trying to help those boys?
Stop, and go back with me." But Arthur was past stopping, either by ability or inclination.