Meanwhile MacWhirlie carefully examined the premises. The open space in front of the mysterious picket post ended in a low ridge which ran for some distance in either direction, and was covered with grass intermixed with tufts of moss and ferns. Beyond that and toward Camp Lawe the ridge was covered with a growth of young bushes. It was close up to this ridge that the lost pickets had been stationed. "Did you observe the position of the men?" asked MacWhirlie. "Not of the first one," answered the Sergeant. "But the second was stationed here. So also was the Captain. They both stood with their faces toward the plain--outward. I watched them both from a distance, after I had left them. The Captain paced up and down, just there along the ridge, keeping his eyes toward the enemy's camp. He made a half face outward, so to speak, as he walked." "Outward? You are quite sure of that?" "Quite." "Very well. I shall take this post now. You will form the entire guard in a circle enclosing this spot." "How far away, Sir?" "Just far enough to have me well in sight. Let the men pace their beats as ordinary sentinels, keeping each other in view, face to face and right about. At the slightest call or alarm of any kind let them close in instantly, all of them at a sharp run." "Is that all, Sir?" "Yes; except that I want you to report to me as soon as the men are placed. You may go, now." "Fall in. Attention. Right face. Forward--March!" The Sergeant marched away at the head of his squad, and was soon stationing the sentries according to orders. As the guard moved off MacWhirlie overheard muttered words of protest dropping from the soldiers' lips. "Can't afford to lose both our leaders!" "It's a useless sacrifice!--Haunted ground!" "Humph!" exclaimed the Lieutenant to himself. "Haunted ground, indeed! The cause of this deviltry is somewhere in this neighborhood, I'll be bound. And there's nothing more ghostly than Pixies at the bottom of it. There's no keeping track of their tricks. We are forever coming across some new tribe, with new habits. Their cunning and skill are beyond belief." He turned his back toward the plain and his face toward the ridge, and in that position kept guard until Sergeant Vigilant returned. "Now," said MacWhirlie, "I want you to take your stand a few rods beyond me in the direction of the Big Cave. Keep your eye on me closely. If anything unusual occurs give the alarm, no matter what it may be. Don't fear to raise a false alarm."