the air on simple surfaces, just as a gliding bird moves.... Such machines will move very rapidly, probably never less than twenty and up to a hundred miles per hour; nothing but the heaviest storms will stop them. They will be small and difficult to hit, and very difficult to damage, and their range of operations will be very large.' Colonel Capper acted on this belief, and during his time at the factory did what he could with meagre funds to encourage aviation. The policy which, in the spring of 1908, he recommended to the War Office was to buy any practicable machines that offered themselves in the market, and at the same time not to relax effort at the factory. The attempts of Lieutenant Dunne and Mr. Cody to construct an efficient aeroplane seemed hopeful, and the factory took them under its wing. Lieutenant Dunne worked at Blair Atholl from 1907 onward, and Mr. Cody, in the winter of 1907-8, began to construct his machine at Farnborough. In the autumn of 1908 the Hon. C. S. Rolls offered to bring to Farnborough a biplane of the Farman-Delagrange type, and to experiment with it on behalf of the Government, in return for the necessary shed accommodation. The acceptance of this proposal had been authorized when an accident to Mr. Cody, caused by want of space, discredited the fitness of the factory ground for aeroplane work, and the arrangement with Mr. Rolls was deferred. He renewed his proposal in the spring of 1909, this time with the offer of a Wright machine, and he had established himself at Farnborough, when his death, at the Bournemouth meeting of 1910, cut short a career of brilliant promise, for Mr. Rolls was not only one of the best of practical aviators, but was alert in all that concerned the science of his craft. At the factory the experiments of Mr. Cody and Lieutenant Dunne were supported and continued, but progress was slow and uncertain, and when, early in 1909, the two machines between them had involved an expense of something like L2,500, further experiments with them were abandoned for a time. Their performance did not seem to warrant a large national outlay, and the bulk of Colonel Capper's work was devoted to what seemed the more promising task of supplying airships for the army. The earliest of these had been designed by Colonel Templer, and two envelopes of gold-beater's skin were ready by 1904, but the cost of making them had been so great that further progress on the ship was arrested until 1907. In September of that year the first British army airship, the _Nulli Secundus_, sausage-shaped, about a hundred and twenty feet long and less than thirty feet in diameter, took the air and passed successfully through its trials. It was driven by an Antoinette engine of from forty to fifty horse-power, and attained a speed of about sixteen miles an hour.