It is hard to understand how the yelling helps a boy when caught in such a dilemma, but we know from experience that it is easier to screech at the top of one's voice, as you strike at the insects that settle about your head, than it is to concentrate all your powers in the single act of running.

Almost unconsciously, Fred began stepping backward, keeping his gaze fixed upon the lion as he did so. If the latter was aware of the stratagem, which is sometimes used with advantage by the African hunter, he did not immediately seek to thwart it, but continued facing him, and occasionally swaying his tail, accompanied by low, thunderous growls.

The boys of the school had learned a great deal of natural history within the last day or two, and Fred had read about the king of beasts. He knew that a lion could crouch on his belly, and, with one prodigious bound, pass over the intervening space.

The lad was afraid the one before him meant to act according to the instincts of his nature, and he retreated more rapidly, until all at once he whirled about and ran for dear life, directly toward the highway.

He did not shout, though, if he had seen any other person, he would have called for help; but, when he reached the road, he cast a glance over his shoulder, expecting to feel the horrible claws at the same instant.

The lion was invisible. Fred could scarcely believe his eyes; but such was the fact.

"I don't understand him," was the conclusion of the boy, who kept moving further away, scarcely daring to believe in his own escape even for a few brief minutes.

Fred had been too thoroughly scared to wish to meet the lion again, but he wanted to get back to the house that the Misses Perkinpine could be told of the new danger which threatened them.

"I think they'll be more likely to believe me than night before last," said the lad to himself.

But nothing could tempt him to venture along the lane again after such an experience.