So ran Buck's thought as he sat breathing heavily, watching the plummet flight of the dead German and his flame-shriveling plane to the earth. Rising again to a higher altitude, he surveyed the surroundings as well as the night's dim light would permit. Nothing to be seen anywhere. All at once Bangs thought of Blaine. Faintly he had heard the sound of explosions down near the earth; but whether the same were bombs, or guns, or if any other cause were responsible the lad did not know. "Ought I to look him up or not?" he more than once asked himself. "No better chap anywhere than Blaine, or for that matter Stanley either." Circling round a wide aerial expanse while cogitating along these lines, he thought he heard the sound of far-off explosions somewhere below. His timepiece showed that the hour was near three A.M. Daylight would soon be showing. In the far west and southwest the thunderous roll of artillery was incessant, mingled with sharper minor concussion of small arms, machine guns and musketry. "That drive must now be in full swing," he thought. "Ought I to circle round there and see if I can do any good? Might take a squint at the Boche front and let our artillery know." He was about to follow out this when another rattle from below came up. Somehow he felt that it might be connected with Blaine and Stanley, nor would the notion rest until he began to descend. The course followed took him somewhat to the north of where the great battle was raging in the southwest, and presently he saw quite an expanse of war-torn forest underneath, or so it seemed from the height at which be flew. Then a third explosion shattered the air, seeming to rise from directly below. Bangs hesitated no longer. Ascertaining that his petrol was still plentiful, he began gliding downward, over a hamlet or two, mostly in ruins, then over a few small fields, and at last over the scraggy trees. Suddenly he saw to the right a broad oval with what looked like a battered wall around it. It might have been three to four hundred yards in length, by half that in width. The dim view perplexed him greatly as he flew, not more than from one to two hundred yards above this singular ruin, completely surrounded, as it seemed by forest, or the remains of forest. All at once, gliding from out some deep shadows, something came rushing along inside this oval, and stopped. A moment later it appeared to rush again over the same course but in the opposite direction. All this dimly came to Buck, swinging easily along overhead. Then it was all clear to him at once. "I'm certainly gettin' nutty," he owned to himself. "That's a plane. Looks like a biplane and it's trying to rise. Why in Hades don't it rise? Probably because it can't."