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 "Before considering the successes obtained by these commanders in the rather rude fashion of warfare which they were forced to adopt, it must be noted, of course, that even on their side there were also scientific resources of a kind; and an effective if eccentric kind. The scientific genius of Bellew Blair had equipped his side with many secret processes affecting aviation and aeronautics, and it is the peculiarity of this extraordinary man that his secret processes really remained for a considerable time secret. For he had not told them to anybody with any intention of making any money out of them. This quixotic and visionary behaviour contrasted sharply with the shrewd good sense of the great business men who knew that publicity is the soul of business. For some time past they had successfully ignored the outworn sentimental prejudice that had prevented soldiers and sailors from advertising the best methods of defeating the enemy; and we can all recall those brilliantly coloured announcements which used to brighten so many hoardings in those days, 'Sink in Smith's Submarine; Pleasure Trips for Patriots.' Or 'Duffin's Portable Dug-Out Makes War a Luxury.' Advertisement cannot fail to effect its aim; the name of an aeroplane that had been written on the sky in pink and