made any complaint, and some of them went out of their way to record their gratitude for the help they had received from the factory. Nevertheless, the uncertainty of its relations with the trade caused the factory, in its early days, to undertake a great diversity of business. The designing of aircraft was plainly a matter of the first importance, and for this designing it was necessary to collect a trained staff. The difficulty here was that there were no professional designers; the aeronautical world was a strange ferment of inventors, amateurs, enthusiasts, heretics of all sorts, wedded to their own notions, and mutually hostile. The factory decided to employ only those designers who had had a solid course of training in engineering shops. By degrees engineers trained in shipyards and officers skilled in motor-car design were added to the staff of the drawing office until, by 1916, it had increased from some half-dozen to two hundred and seventy-five. When the war came this drawing office proved its value. An immense number of aeroplanes was required, and many firms had to be employed to make them. Some of these firms were well staffed, others not so well. The factory made elaborate detailed dimensioned drawings, marked with every permitted kind and degree of variation--as many as four hundred drawings to a single aeroplane. With the help of these drawings all kinds of firms--organ-builders, makers of furniture, or pianos, or gramophones, or motor-cars--could be turned on to aeroplane manufacture. In the course of two years half a million drawings were issued to various firms; and those firms to whom the whole business of engineering was strange were successfully initiated in one of its most delicate and difficult branches. Here, too, the outcry was raised, in the newspapers and in Parliament, that the factory was attempting to make a Government monopoly of aircraft design and air-engine design. The accusation was disproved; it would probably never have been made but for the admirable efficiency of the factory in rising to meet a national crisis. National defence, it is agreed, cannot safely be left wholly to private enterprise, even in England. The factory carried out an immense number of experiments in connexion with aeroplanes and airships. The quest for stability, longitudinal and lateral, in aeroplanes was the chief preoccupation of these early years. Powerful engines are useless in a ship which cannot be trusted to keep afloat. It was this quest, as much as anything, which drew the factory into designing aeroplanes. The various types of aeroplane designed at the factory bear names which consist of a pair of initial letters, with a number affixed. The letters indicate the type of the machine; the number indicates its place in the series of continually improving variants of the same type. Three of these types were gradually being evolved at the factory in the course of the year 1911.