All these varied craft had their separate functions, difficulties, and dangers. Two things only were shared by all of us--dodging Archie and striving to strafe the Air Hun. Since those days flying conditions on the Western Front have been much changed by the whirligig of aeronautical development. All things considered, the flying officer is now given improved opportunities. Air fighting has grown more intense, but the machines in use are capable of much better performance. The latest word in single-seater scouts, which I am now flying, can reach 22,000 feet with ease; and it has a maximum climb greater by a third, and a level speed greater by a sixth, than our best scout of last year. The good old one-and-a-half strutter (a fine bus of its period), on which we used to drone our way around the 150-mile reconnaissance, has disappeared from active service. The nerve-edging job of long reconnaissance is now done by more modern two-seaters, high-powered, fast, and reliable, which can put up a fight on equal terms with anything they are likely to meet. The much-discussed B.E., after a three-year innings, has been replaced for the most part by a better-defended and more satisfactory artillery bus. The F.E. and de Haviland pushers have likewise become obsolete. The scouts which we thought invincible last autumn are badly outclassed by later types. For the rest, the Flying Corps in France has grown enormously in size and importance. The amount of work credited to each branch of it has nearly doubled during the past year--reconnaissance, artillery observation, photography, bombing, contact patrol, and, above all, fighting. Air scraps have tended more and more to become battles between large formations. But most significant is the rapid increase in attacks by low-flying aeroplanes on ground personnel and materiel, a branch which is certain to become an important factor in the winning of the war. And this whirlwind growth will continue. The world at large, as distinct from the small world of aeronautics, does not realize that aircraft will soon become predominant as a means of war, any more than it reckons with the subsequent era of universal flight, when designers, freed from the subordination of all factors to war requirements, will give birth to machines safe as motor-cars or ships, and capable of carrying heavy freights for long distances cheaply and quickly. Speaking of an average pilot and a non-expert enthusiast, I do not believe that even our organisers of victory are yet aware of the tremendous part which aircraft can be made to take in the necessary humbling of Germany.