The unhappy Don Luis, having drawn, in broken, gasping sentences, the main outlines of his tragical story, was still filling in some of the more lurid details of that morning's happenings upon his farm, when the lookout perched aloft on the hillside signalled the approach of the enemy; and while Carlos dashed off in one direction to sound the alarm bell and occupy his former defence post, Jack rushed off in the other to raise the temporary drawbridge which had been constructed to take the place of the wrecked stone bridge, and which was now the only means of entering upon and leaving the estate. Having raised the bridge, and carefully secured it against any possibility of becoming lowered by accident, Jack climbed the structure to its uplifted extremity, and from thence looked out over the wide plain that gently sloped away toward the east, south, and west of him; and presently he became aware of a loud, confused, rumbling jumble of sound which, when he was presently able to dissect it, resolved itself into a mingled trampling of multitudinous feet and hoofs, a rumbling and creaking of many wheels, the combined murmur of many human voices, the occasional low, deep, protesting bellow of overdriven animals, the crack of whips, and the continuous shouts of men. The air was still thick with acrid smoke, rendering it difficult to see anything clearly at a distance greater than half a mile; but presently it thickened still more, and Jack recognised that the thickening was produced by a great cloud of dun-coloured dust, out of the midst of which there presently cantered into view a number of Spanish cavalry scouts, a dozen of whom, upon reaching the main road, wheeled to their right and dashed along it toward the point of its junction with the private road leading to Don Hermoso's estate.