The young troops had been kept in splendid condition, drilling steadily, and they marched well. They passed to the extreme western end of the Confederate camp, and continued into the hills. The sun had passed its zenith when they started and a pleasant, cool breeze blew from the slopes of the western mountains. The sun set late, but the twilight began to fall at last, and they saw about them many places suitable for a camp and supper. But Colonel Talbot, who was now at the head of the line, rode on and gave no sign. "If I were riding a bay horse fifteen hands high I could go on, too, forever," whispered Langdon to Harry. "Remember your belief that everything happens for the best and just keep on marching." The twilight retreated before the dark, but the regiment continued. Harry saw a dusky colonel on a dusky horse at the head of the line, and nearer by was Lieutenant-Colonel St. Hilaire, also riding, silent and stern. The Invincibles were weary. It was now nine o'clock, and they had marched many hours without a rest, but they did not dare to murmur, at least not loud enough to be heard by Colonel Leonidas Talbot and his lieutenant-colonel, Hector St. Hilaire. "I wonder if this is going on all night," whispered Langdon. "Very likely," returned Harry, "but remember that everything is for the best." Langdon gave him a reproachful look, but trudged sturdily on. They halted about an hour later, but only for fifteen or twenty minutes. They had now come into much rougher country, steep, with high hills and populated thinly. Westward, the mountains seemed very near in the clear moonlight. No explanation was given to the Invincibles, but the officers rode among the groups and made a careful inspection of arms and equipment. Then the word to march once more was given. They did not stop, except for short rests, until about three o'clock in the morning, when they came to the crest of a high ridge, covered with dense forest, but without undergrowth. Then the officers dismounted, and the word was passed to the men that they would remain there until dawn, but before they lay down on the ground Colonel Talbot told them what was expected of them, which was much. "A strong Northern force is encamped on the slope beyond," he said. "It is in a position from which the left flank of our main army can be threatened. Our enemies there are fortified with earthworks and they have cannon. If they hold the place they are likely to increase heavily in numbers. It is our business to drive them out."