For ten days after that, a company of United States Volunteers drove their way through the mountains and _bosques_ of eastern Luzon, with the hammer-blows of forced marches. Their faces were the bristling, unshaven visages of half-wild men, and their eyes bore the inky cancellation-marks of a fatigue which, in such climates, is courtship of death. They had been bearing a noonday steam-like heat that parboiled them and wasted them in floods of sweat. They had marched and slept in wet khaki when sudden rains drenched the land and the jungle simmered afterward. A demoniacal desire for a reckoning in full with one José Rosario sustained them. The chase had resolved itself into a hellish adaptation of hare and hound, for always ahead of them lay clews and information, and evidences of recent departures. Always, the wily guerilla was just out of grasping and crushing distance. In lonely villages, they found marks of his recent occupancy--with prisoners. In the hills, they found the ashes of his fires, but himself they never found. And, as he taunted them, they followed, "as dust-blown devils go": followed with an artificial and superhuman endurance engendered of mountain hate and an unassuaged thirst for vengeance. In many brains queer nightmare shapes rose and had to be brushed aside with a conscious effort, and in many veins the blood ran hot and feverish. The pursuit had carried them in a long circle like the flight of a fox, and brought them back to a point not so many miles from where they had entered the hills, but as far as ever from their quarry. The pursuing force was too large. The rest of the way they would rake _bosque_ and hill in scattered segments, each acting for itself and seeking to fall upon the enemy while he watched the decoy of the largest detachment. Major Falkins and a dozen men, including First Sergeant Newton Spooner, were working their way through a jungle which seemed impervious to human progress. For days they had been so working. Step by step they moved lethargically, and in single file. No military order of formation can be kept unbroken where men are weaving their tired bodies in and out through a matted growth of rank _bijuca_ and jungle tangles. Besides, they moved as men half-asleep and indifferent to consequences, dragging leaden feet. The course they had taken had yielded never a sign, never an indication that they had chosen wisely. It led them through an unpeopled country where the valleys were mosquito-infested and malaria-ridden, and where drenching rains brought chill to their aching bones. They forced themselves forward with their hair matted and their brains dull. Clouds of mosquitoes moved with them. They were steadfast and resolute men, but they were also half-insane.