While wondering at the change, away on the hills to our right there rose a thundering tread, like the marching of a mighty multitude. Shamus, who sat directly facing the hill, saw something which chilled the Dobeen blood, and caused that noble Irishman to plunge behind us. Mr. Colon, who had given a startled turn of the head over his right shoulder, exclaimed, "Bless me, what's that?" The glance of Muggs froze that Briton so completely that he failed to tell us of ever having seen a more "hextraordinary thing in Hingland." I am in doubt whether even our grave professor did not imagine for the moment that the mammalian age was taking a tilt at us. Gathering twilight had magnified what in broad day would have been an apparition sufficiently startling to any new arrival in Buffalo Land. A long line of black, shaggy forms was standing on the crest and looking down upon us. It had come forward like the rush of a hungry wave, and now remained as one uplifted, dark and motionless. In bold relief against the horizon stood an array of colossal figures, all bristling with sharp points, which at first sight seemed lances, but at the second resolved into horns. Then it dawned upon our minds that a herd of the great American bison stood before us. What a grateful reduction of lumps in more than one throat, and how the air ran riot in lately congealed lungs! Dobeen declared he thought the professor's "ghosts of the centuries" had been looking down upon us. One old fellow, evidently a leader in Buffalo Land, with long patriarchial beard and shaggy forehead, remained in front, his head upraised. His whole attitude bespoke intense astonishment. For years this had been their favorite path between Arkansas and the Platte. Big Creek's green valley had given succulent grasses to old and young of the bison tribe from time immemorial. Every hollow had its traditions of fierce wolf fights and Indian ambuscades, and many a stout bull could remember the exact spot where his charge had rescued a mother and her young from the hungry teeth of starving timber wolves. Every wallow, tree, and sheltering ravine were sacred in the traditions of Buffalo Land. The petrified bones of ancestors who fell to sleep there a thousand years before testified to purity of bison blood and pedigree. Now all this was changed. Rushing toward their loved valley, they found themselves in the suburbs of a town. Yells of red man and wolf were never so horrible as that of the demon flashing along the valley's bed. A great iron path lay at their feet, barring them back into the wilderness. Slowly the shaggy monarch shook his head, as if in doubt whether this were a vision or not; then whirling suddenly, perhaps indignantly, he turned away and disappeared behind the ridge, and the bison multitude followed.