The staff-officer turned an anxious pair of eyes upward for a swift look into the sky, seemed about to make a remark and then obviously refrained. "Good luck!" was all he could trust himself to say.
The aviator smiled and nodded cheerfully. Then he ejaculated a sharp order to the mechanics. They flung the blades of the tractor into revolution. The machine, emitting a series of riflelike reports, commenced to run across the field. The tractor became a blur.
The woodland appeared to rush towards him and then suddenly dropped away in a diagonal underneath. His eyes on the dial of the barograph, the aviator warped the machine round and set the planes to an acute angle of elevation. Confident in the power of his engine he mounted steeply in a spiral. The record on the dial rose with every second—100 feet—200—400. In two and a half minutes he had risen 1000 feet. He cast a swift look below him. He was still over the field, had a glimpse of a group of tiny figures clustered in front of the sheds. The rim of the horizon came up, the earth fell into a great concavity. It was like looking down into a vast bowl containing woods and fields and flattened hills. From the bowl clouds of yellow-grey dust arose like smoke and out of the dust came a multiplicity of heavy crashes that detached themselves from a background of unceasing clatter mingled with one long rolling thunderous roar.
It was but a hasty glance the aviator threw below him. Still mounting, his eyes searched the blue air on a level with himself, above him. The enemy's three machines where were they? Far off to his left a dark speck hung in the sky. He watched it intently as his machine climbed. It was a biplane. It appeared to be drifting away from him, engaged in a reconnaissance of their left flank, he decided. At any rate as yet they seemed not to have perceived him. The others were not visible. He shot a glance at the barograph—3000 feet. He had been climbing for five and a half minutes. Almost immediately he saw a trail of smoke ascending with incredible velocity in the air a little below him to his right. The trail finished abruptly in a vivid flash, a burst of white smoke and a violent detonation. The monoplane rocked from side to side in the sudden disturbance of the air but continued to climb. A second later a similar trial ended in an explosion at a level with him on his left. He saw a gash appear suddenly in the fabric of one of his planes, and the needle of the barograph switch back 50 feet with a jerk. Then the altitude record mounted again steadily—3250—3500—4000. The noise of the battle diminished as he rose, dropped to a point where it was all but obscured by the roar of his own engine. Below him the smoke trails leaped up at him and burst viciously in vain.
Four thousand five hundred—he glanced at the hostile biplane to his left and saw that it hung larger in the sky. Even in the moment for which he watched it it dilated. It was approaching at top speed. He was discovered, pursued. Instantly he turned off to his right and raced across the battlefield in the direction of the threatening flank. As he did so, he perceived another aeroplane rising from the enemy's lines. It climbed swiftly in bold swoops and then shot off towards him in a great upward slant. Two! Where was the third? He failed to discover it and held on his course.
His direction was at an angle across the battlefield which took him towards the enemy's left flank rather than to their own right. As he sped over it, he looked down upon a broad miles-long belt of yellow-grey dust that rose raggedly into the air, and was spotted with an innumerable multitude of white puffs that renewed themselves as fast as they were dissipated. In many places these puffs congregated thickly and, as they broke, linked themselves with others until they floated like little narrow clouds in the air below him. As he looked down into the great concavity of the earth he seemed to be over some enormous smoking fissure in a crater whose circumference was the horizon. The rumble and roar which ascended from it assisted the illusion. Tiny sparks of flame darted and flickered in the fumes of that inferno, and here and there flashed a number of glittering points, the reflection of the sun from advancing bayonets. To distinguish men was impossible, but in occasional rifts in the dust curtain he could make out brown patches of varying size, and, over to his left, on the enemy's side, similar though darker patches.
He could permit himself no sustained scrutiny of the scene below him for the management of the machine began to claim all his attention. Even at that great height above the battle, the air on that windless day, shaken and riven by the unceasing concussions of the massed artillery of two armies, was full of flaws. The needle of the barograph flickered, oscillated violently in leaps to and fro. The monoplane, tilted dangerously, now on one side, now on the other, in eddies of the tortured atmosphere, slid downward dizzily ere it could be brought up to climb a bank of air. It needed strong arms at the controls, a quick brain and nerves of perfect tone to keep her upon the appointed course. Glancing back, the aviator saw that the flight of the nearer of the two hostile machines, the one which had risen from the enemy's lines and was now approaching him on his left, was similarly erratic.
An overpowering heat, as from a vast open furnace, arose from the battlefield below. It was the heat from thousands of explosions, renewed incessantly and sustained over many hours. Stifling gusts blew on to the aviator's face, carrying with them a peculiar smell of burning cloth. With these gusts the roar of the battle seemed to leap up to him. The air was oppressive despite the speed at which he clove it, highly charged with electricity, heavy with the menace of a storm. Yet no cloud broke the monotony of the blue sky. The machine raced onward, was now crossing the battle lines of the enemy's left flank.
Suddenly he heard a faint rattle behind him. The hostile aeroplane, realising that it had failed to head him off, was firing furiously. He felt the machine shiver under a quick succession of hard raps. Instinctively, he pressed upon his accelerator, and, with a touch on the warping lever, the machine shot forward at terrific speed. The raps ceased. He turned his head and saw his enemy rapidly diminish in size behind him, saw that the other aeroplane, the one he had seen first, had fallen far in rear. A confident smile came on the tight lips of the aviator. He could outpace them both.