Suddenly there is the distant hum of a motor. One of the pilots emerges from the tent and gazes fixedly up into the blue sky. He points, and one glimpses a black speck against the blue, high overhead. The sound of the motor ceases, and the speck grows larger. It moves earthward in steep dives and circles, and as it swoops closer, takes on the shape of an airplane. Now one can make out the red, white, and blue circles under the wings which mark a French war-plane, and the distinctive insignia of the pilot on its sides.