Their route lay through the pass of Roncesvalles so narrow at points that only two, or at most three men could move abreast, while the rugged bordering hills were covered with dense forest, affording a secure retreat for an ambushing foe. It was when the main body of the army was miles in advance, and the rear-guard struggling up this narrow defile, that disaster came. Suddenly the surrounding woods and mountains bristled with life. A host of light-armed Basque mountaineers emerged from the forest, and poured darts and arrows upon the crowded columns of heavily-armed Franks below. Rocks were rolled down the steep declivities, crushing living men beneath their weight. The surprised troops withdrew in haste to the bottom of the valley, death pursuing them at every step. The battle that followed was doubtless a severe and hotly-contested one; the prominent place it has gained in tradition indicates that the Franks must have defended themselves valiantly; but they fought at a terrible disadvantage, and in the end they were killed to a man. Then the assailants, rich with the plunder which they had obtained from the baggage-wagons and the slain bodies, vanished into the forests whence they came, leaving to Charlemagne, when he returned in search of Roland and his men, only the silence of death and the livid heaps of the slain in that terrible valley of slaughter. Such is the sober fact. Fancy has adorned it with a thousand loving fictions. In the valleys are told a multitude of tales connected with Roland's name. A part of his armor has given its name to a flower of the hills, the _casque de Roland_, a species of hellebore. The _breiche de Roland_, a deep fissure in the mountain crest, is ascribed to a stroke of his mighty blade. The sound of his magic horn still seems to echo around those rugged crests and pulse through those winding valleys, as it did on the day when, as legend says, it was borne to the ears of Charlemagne miles away, and warned him of the deadly peril of his favorite chieftain. This horn is reputed to have had magical powers. Its sound was so intense as to split all other horns. The story goes that Roland, himself sadly wounded, his fellows falling thickly around him, blew upon it so mighty a blast that the veins and nerves of his neck burst under the effort. The sound reached the ears of Charlemagne, then encamped eight miles away, in the Val Carlos pass. "It is Roland's horn," he cried. "He never blows it except the extremity be great. We must hasten to his aid." "I have known him to sound it on light occasions," answered Ganalon, Roland's secret foe. "He is, perhaps, pursuing some wild beast, and the sound echoes through the wood. It would be fruitless to lead back your weary host to seek him."