Their talk evidently finished to the satisfaction of both, introductions were in order. Then the aviator, Hals, shouted a command into the barn and instantly there issued from the gloom within, four soldiers. I watched them roll back the creaking door and then, as though it were a fragile thing, they began slowly to push out the aeroplane--a monoplane I judged, as its long, tapering fuselage protruded into the farm yard, and then I saw with a start that the wings were a biplane's--a strange craft. Events passed with bewildering rapidity. Half in a daze I saw the tall, solemn-looking aviator survey my warm clothing with an approving nod. The next instant I was buckling on a steel head protector, and when I noticed the machine again, it had been wheeled out into the flat, neighboring field. A level place I observed, packed hard with shale and dirt, made into a landing place for the planes. I caught a glimpse, at the extreme end of the field near the house, of two soldiers, fitting two wooden objects, painted the drab green of the field, into two pairs of prepared holes, one thirty feet behind the other. They were stout hoops, supported by posts, and rimmed with electric light bulbs. I noticed that the rear was perhaps two feet less in diameter than the other, and that when you stood directly in front of them, they gave the effect of concentric circles, their circumference but a foot apart. "What is that for?" I asked Hals, and he explained that if it grew dark, the lights were lit, and if from above the aviator saw two fiery circles concentric, he knew that he could fly straight for them and alight in safety. "But I hope," he added, "that nothing will prevent us from landing in daylight." I did not like that "nothing will prevent us." I found myself wondering what could prevent us, deciding finally that it was only the usual jocular way of the aviator to frighten his passenger unduly before the flight begins. Had I but known!