Since the Armistice there have been published a great number of books on the War, the majority of which have been the work of actual participants—of officers and enlisted men. But so far as the Air Service of the United States is concerned Major Haslett has, in my opinion, in the relation in simple narrative form of some of the adventures he himself met with Overseas provided not only the most interesting story but one of the very few which the future historian will find of considerable value when he sets himself to the task of compiling Air Service History. “Luck on the Wing” is the story of an American observer. The claims to fame of the fighting pilot were early recognized in the World War. The Ace soon became a public favorite. The War Correspondents were quick indeed to realize the news potentialities inherent to the “Knight of the Air” and their dispatches made the world familiar with his extraordinary and ordinary adventures. The peoples of the World followed with the zest that the American baseball fanatic follows the baseball victories, the scores of the World’s great Aces. But to the observer fame came in rather homeopathic doses, if it came at all. And most observers are willing to take oath it came not at all. That there were exceptions to this rule, that the very important work of the observer was not entirely lacking of official and public recognition, is a source of personal gratification to me because as Commander of the American Air Forces at the Front I personally knew and fully appreciated the great value of the work done by this class of Air Service officers. Major Haslett is deservedly one of the exceptions. The variety of his war service qualifies him better perhaps than any other American Air Service Observer to write of Air Observation: the efficiency of his work is attested sufficiently by the fact that he was rapidly promoted from Lieutenant to Captain and from Captain to Major. His personal daring and courage, and the extent of both, need no testimony and indeed could have none more eloquent than the citations he received and the decorations awarded him. To say that this officer or that officer was the “greatest” fighting pilot or the “greatest” observer in the American Air Service overseas would, assuming that it were possible, and many hold that it is impossible, assuredly be improper; but of Major Haslett it may be said with entire propriety that the value of his services was certainly not exceeded by the services rendered by any other observation officer in the American Air Service. And it must always in after life be a source of great pride and satisfaction to this officer to know that he successfully executed every mission upon which he was sent up to the day that he was shot down far behind the enemy lines in the Argonne after an unequal but protracted combat with superior enemy forces.