“It’s a mountain lion,” replied Hal with all the steadiness of voice he could command. Being older and larger than Byron, he felt that the responsibility of the situation rested on him.

“Let’s run,” proposed the smaller boy, tugging at Hal’s sleeve.

“No, we mustn’t do that,” replied the latter. “If we stand still and don’t seem to be afraid, he may go away and leave us alone.”

Hal now had good reason to congratulate himself on his industry during his three years at Lakefarm. He had found much of interest in the doctor’s library, reading everything that appealed to his taste. Among the books that he most enjoyed were illustrated natural histories, and it is little wonder that he recognized now the kind of beast before him, although he had never before seen one. He remembered also that these books had informed him that mountain lions are not so fierce as commonly thought, that they usually hunt at night and are cowardly and little to be feared unless cornered.

The puma was only a few rods away from Hal and Byron, who stood close to the bluff that formed a turning point in the path. For more than a minute boys and beast stood facing each other, neither moving. Byron wished to run and continued to pull at his companion’s coat-sleeve, but Hal, relying on his book information, stood firm. Presently the beast backed away.

“See? What did I tell you?” exclaimed the older boy gleefully. But his exultation was somewhat hysterical, indicating the strain he had undergone.

The puma backed slowly at first, but presently his retreat became more rapid. Then suddenly he turned and, with a few bounds, disappeared among the pine trees.

Hal was now willing to run, and both boys started out at their best pace up the trail. The ascent was not very steep here, so they ran some distance before they were too tired to go farther. Then they stopped and looked back, and, seeing no sign of the lion, they rested a while.

Then they took things a little easier, but they went faster than they would have under ordinary circumstances. A short distance from the top of the mountain, they were met by all the other boys, Dr. Byrd, Mr. Frankland, Mr. Porter, and Mr. and Mrs. Turman, who were much excited. The burro had returned alone and with more speed than it had ever been known to make before. Naturally this caused alarm, and a general rush was made to investigate.

Hal and Byron excitedly explained what had happened. Then followed a rapid succession of questions and answers until all the details of the adventure were told. Finally Aunt Sarah Jane added a new element of interest by saying: