I Spy By Natalie Sumner Lincoln "Bauerschreck!" he shouted, and the airman followed his pointed finger. Instantly under his skillful manipulation their biplane climbed into the air in long graceful spirals until they were six thousand feet above ground. But as fast as they went, their heavier Aviatik was no match in speed for the swift French aeroplane, and the bullets from the latter's machine gun were soon uncomfortably near.