We were further handicapped for the French service by our lack of the language. Indeed, this seemed to be the most serious obstacle in the way to success. With a good general knowledge of the language it seemed probable that we might be able to overcome our other deficiencies. Without it, we could see no way to mastering the mechanical knowledge which we supposed must be required as a foundation for the training of a military pilot. In this connection, it may be well to say that we have both been handicapped from the beginning. We have had to learn, through actual experience in the air, and at risk to life and limb, what many of our comrades, both French and American, knew before they had ever climbed into an aeroplane. But it is equally true that scores of men become very excellent pilots with little or no knowledge of the mechanics of the business. In so far as Drew and I were concerned, these were matters for the future. It was enough for us at the moment that our applications had been approved, our papers signed, and that to-morrow we were leaving for the _Ecole d'Aviation Militaire_ to begin our training. And so, after a long evening of pleasant talk and pleasanter anticipation of coming events, we left our restaurant and walked together through the silent streets to the Place de la Concorde. The great windy square was almost deserted. The monuments to the lost provinces bulked large in the dim lamplight. Two disabled soldiers hobbled across the bridge and disappeared in the deep shade of the avenue. Their service had been rendered, their sacrifices made, months ago. They could look about them now with a peculiar sense of isolation, and with, perhaps, a feeling of the futility of the effort they had made. Our adventures were all before us. Our hearts were light and our hopes high. As we stood by the obelisk, talking over plans for the morrow, we heard, high overhead, the faint hum of motors, and saw two lights, one green, one red, moving rapidly across the sky. A moment later the long, slender finger of a searchlight probed among little heaps of cloud, then, sweeping in a wide arc, revealed in striking outline the shape of a huge biplane circling over the sleeping city. It was one of the night guard of Paris.