"Race back like mad when I'm off," he said. "'Ware Huns!"
The engine began to roar.
"Stand clear!" he said.
The machine rolled off along the grass, gathering momentum; the tail lifted; the wheels rose clear; and she skimmed the grass like a huge bird. In a few seconds Burton was slanting upward on the first round of his spiral course.
Ten minutes later a party of German infantry, some fully clothed, others in various stages of deshabille, rushed breathlessly over the rise into the now deserted hollow.
"I am sure," said one of them, "the first sound came from somewhere about here. Then an aeroplane rose like a big black bird above the trees. I gave the alarm the moment I heard the engine."
"You must have been dreaming, stupid," said his lieutenant, irritable at being wakened. "There was no aeroplane here at nightfall; one couldn't have gone up if it hadn't come down first, and I must have heard that. Think yourself lucky I don't report you for sleeping on duty. Feldwebel, bring the men back."
The lieutenant turned on his heel and plodded grumbling back down the hill. The glare of Verey lights, the bursting of shells in the sky westward, might have confirmed the man's story; but Lieutenant Schnauzzahn was never the man to admit himself in the wrong.
IV
A little before eleven on the following night, the Germans on that part of the front were thrown into agitation by a sudden burst of unusually violent gun-fire from the British artillery. Such a bombardment was commonly preliminary to an infantry attack, and the German soldier, though brave enough, is no longer quite easy in mind at the prospect of meeting British "Tommies." The few men in the front trenches cowered on the ground or in their dug-outs; the communication and support trenches filled up; and Verey lights illuminated the No Man's Land across which they expected the enemy to swarm when the bombardment ceased.