The prospect of being besieged all night in a tree by a pack of mountain wolves was not a pleasant one by any means, and Fred, who had climbed up among the branches with the object of securing a few hours' slumber, found little chance of closing his eyes for even a minute.

“It might have been worse,” he reflected, as he listened to the dismal howling, “for if they had happened to come down upon me when I was walking along the ravine, I could n't have gotten into any place like this in time to save me. Wolves don't know how to climb trees, and so long as I stay here I'm all right; but I can't stay here forever.”

By-and-by there was a sharp pattering upon the ground, and then the hoarse howling changed to quick, dog-like yelps, such as these animals emit when leaping down upon their prey, and which may be supposed to mean exultation.

Fred came down sufficiently far from his perch to get a glimpse of the ground beneath. He saw nearly a score of huge mountain wolves, bounding hither and thither, and over each other, and back and forth, as though going through some preliminary exercise, so as to prepare themselves for the feast that was soon to be theirs.

“If I was down there,” thought the boy, with a shudder, “I suppose I'd last them about two minutes, and then they'd be hungrier than ever. They'll stay there all night, but I wonder if they'll go away in the morning. If they don't, I can't tell what's to become of me.”

He watched them awhile with a lingering fear that some of them might manage to get among the branches, but they did not make the attempt. They had sufficient dexterity to leap from the ground up among the lowermost limbs, but had no power of retaining their position, or doing anything after they got there.

Nature had unfitted them for such work, and they did not try it. They seemed to possess tireless activity, and they kept up their leaping and frolicing as though they had nothing else in the world to do.

After watching them until he was tired, Fred carefully climbed up among the branches again, where he secured himself as firmly as was possible. He had lain his rifle across a couple of limbs above his head, and fixed upon a place within a dozen feet or so of the top, as the one offering the best support.

Here two or three limbs were gnarled and twisted in such a way that he could seat himself and arrange his body in such a way that he could have enjoyed a night's slumber with as much refreshment as if stretched out upon a blanket on the ground. But the serenade below was not calculated to soothe his nerves into soft, downy sleep, and he shuddered at the thought of sitting where he was for four or five hours, with the pattering feet below him, varied by a yelp or howl, when he should feel disposed to close his eyes.

“But, then, it can't be helped,” he added to himself, endeavoring to look philosophically at the matter. “I ought to be thankful that they didn't catch me before I reached the tree, and so I am; and I would be very thankful, too, if they would go away and leave me alone. I've got a bed here twice as good as I expected to find, and could sleep as well as anywhere else.”

Almost any sound long continued becomes monotonous, and thus it was that scarcely a half-hour had passed when, in spite of the dreadful beasts below, his eyes began to grow heavy and his head to droop.

But at this juncture he received a terrible shock. Just as everything was becoming dreamy and unreal, he was startled by a jarring of the tree, as though struck with some heavy object. When it was repeated several times, his senses returned to him, and he raised his head and listened.

“I wonder what that can be?” he said to himself. “Is some one hitting the tree? No, it isn't that.”

It seemed not so much a jarring of the trunk as a swaying of the whole tree.

Puzzled and alarmed, Fred drew his legs from their rather cramped position, and picked his way downward among the limbs until he had descended far enough to inform himself.

“Heaven save me! they're in the tree!” he gasped, paralyzed for the moment with terror.

In one sense, such was the case. The frolicsome wolves had varied their amusement by springing upward among the lowermost branches. A brute would make a jump, and, landing upon the limb, sustain himself until one or two of his comrades imitated his performance, when they would all come tumbling to the ground.

Thus, it may be said, they were climbing the tree, but they were scarcely in it when they were out of it again, and Fred had nothing to fear from that source.

In his fright, he hastily clambered back again after his rifle, with the intention of shooting the one that was nearest, but by the time he laid his hand upon the weapon his terror had lessened so much that he concluded to wait until assured that it was necessary. And a few minutes' waiting convinced him that he had nothing to fear from that source. It was only another phase of the hilarious fun they were keeping up for their own amusement.

“I guess I'll try it again,” concluded Fred, as he proceeded to stow his arms and legs into position for the nap which he came so near c............