But the Southern infantry were so far away that the artillery fire did not harm. Ever urged on by Jackson, they pressed through fields and marshy ground, their destination a low ridge from which, as a place of advantage, they could reply to the Union batteries. From the east and from a point near a church called the Opequon came the thunder of their own guns advancing up the other side of the turnpike. Now the great marching qualities of Jackson's men were shown. Not in vain had they learned to be foot cavalry. They pressed forward through the deep mud and always the roar of the increasing fire called them on. Before them stretched the ridge and Harry was in fear lest the enemy spring forward and seize it first. But no foe appeared in front of them in the fields, and then with a rush they were at the foot of the ridge. Another rush and they had climbed it. Harry from its crest saw the wide field of combat and he knew that the greater battle had just begun. CHAPTER VI. KERNSTOWN The long winding lines of the two armies spread over a maze of fields, woods and thickets, with here and there a stone wall and scattered low hills, which could be used as points of strength. Jackson's men, led by able officers, were pushing forward with all their might. The woods, the thickets and the mud nullified to some extent the superior power of the Northern artillery, but the rifles were pouring forth shattering volleys, many at close range. Harry felt his horse stagger just after he reached the crest of the hill, but he took no notice of it until a few minutes later, when the animal began to shiver. He leaped clear just in time, for when the shiver ceased, the horse plunged forward, fell on his side and lay dead. As Harry straightened himself on his feet a bullet went through the brim of his cap, and another clipped his epaulet. “Those must be western men shooting at you, Harry,” said a voice beside him. “But it could have been worse. You're merely grazed, when you could have been hit and hit deep.” It was Langdon, cool and imperturbable, who was speaking. He was regarding Harry rather quizzically, as the boy mechanically brushed the mud from his clothes. “Force of habit,” said Langdon, and then he suddenly grasped Harry and pulled him to his knees. There was a tremendous crash in front of them, and a storm of bullets swept over their heads. “I saw a Yankee officer give the word, and then a million riflemen rose from the bushes and fired straight at us!” shouted Langdon. “You stay here! See the Invincibles are all about you!” Harry saw that he had in truth fallen among the Invincibles. There was St. Clair, immaculate, a blazing red spot in either cheek, gazing at the great swarms of riflemen in front. Colonel Leonidas Talbot and Lieutenant-Colonel Hector St. Hilaire, those veteran West Pointers, were stalking up and down in front of their lines, fiercely bidding their men to lie down. But Harry knew that his duty was elsewhere.