In the midst of this exciting scene there was one heart which beat with a nervous vehemence that well-nigh burst it. This was the heart of Dick Varley's horse, Charlie. Well known to him was that distant rumbling sound that floated on the night air into the fur-traders' camp, where he was picketed close to Cameron's tent. Many a time had he heard the approach of such a wild troop, and often, in days not long gone by, had his shrill neigh rung out as he joined and led the panic-stricken band. He was first to hear the sound, and by his restive actions to draw the attention of the fur-traders to it. As a precautionary measure they all sprang up and stood by their horses to soothe them, but as a brook with a belt of bushes and quarter of a mile of plain intervened between their camp and the mustangs as they flew past, they had little or no trouble in restraining them. Not so, however, with Charlie. At the very moment that his master was congratulating himself on the supposed security of his position, he wrenched the halter from the hand of him who held it, burst through the barrier of felled trees that had been thrown round the camp, cleared the brook at a bound, and with a wild hilarious neigh resumed his old place in the ranks of the free-born mustangs of the prairie. Little did Dick think, when the flood of horses swept past him, that his own good steed was there, rejoicing in his recovered liberty. But Crusoe knew it. Ay, the wind had borne down the information to his acute nose before the living storm burst upon the camp; and when Charlie rushed past, with the long tough halter trailing at his heels, Crusoe sprang to his side, seized the end of the halter with his teeth, and galloped off along with him. It was a long gallop and a tough one, but Crusoe held on, for it was a settled principle in his mind _never_ to give in. At first the check upon Charlie's speed was imperceptible, but by degrees the weight of the gigantic dog began to tell, and after a time they fell a little to the rear; then by good fortune the troop passed through a mass of underwood, and the line getting entangled brought their mad career forcibly to a close; the mustangs passed on, and the two friends were left to keep each other company in the dark. How long they would have remained thus is uncertain, for neither of them had sagacity enough to undo a complicated entanglement. Fortunately, however, in his energetic tugs at the line, Crusoe's sharp teeth partially severed it, and a sudden start on the part of Charlie caused it to part. Before he could escape, Crusoe again seized the end of it, and led him slowly but steadily back to the Indian camp, never halting or turning aside until he had placed the line in Dick Varley's hand. "Hallo, pup! where have ye bin? How did ye bring him here?" exclaimed Dick, as he gazed in amazement at his foam-covered horse.