The work of Major Brooke-Popham's squadron, during these years of preparation, included a great diversity of experiment. With the progress of flight it began to be realized that fighting in the air was, sooner or later, inevitable, and in the winter of 1913 a series of experiments was carried out at Hythe, by a single flight of No. 3 Squadron, under Captain P. L. W. Herbert, to determine the most suitable kind of machine-gun for use in aeroplanes. A large number of types were tested, and the Lewis gun was at last chosen, with the proviso that it should go through a series of tests on the ground. These took a long time, and it was not till September 1914 that the first machines fitted with Lewis guns reached the Flying Corps in France. From the beginning of 1914 onwards, No. 3 Squadron also began a whole series of experiments in photography; Government funds were scanty, and the officers bought their own cameras. There was no skilled photographer among them, but they set themselves to learn. They devised the type of camera which was used in the air service until 1915, when Messrs. J. T. C. Moore-Brabazon and C. D. M. Campbell brought out their first camera. They would develop negatives in the air, and, after a reconnaissance would land with the negatives ready to print. In one day, at a height of five thousand feet and over, they took a complete series of photographs of the defences of the Isle of Wight and the Solent. From time to time there were a good many adventures by members of the squadron outside the daily routine. The first night flight made by any officer of the Military Wing was made on the 16th of April, 1913, by Lieutenant Cholmondeley, who flew a Maurice Farman machine by moonlight from the camp at Larkhill to the Central Flying School at Upavon, and back again. Later in the year Commander Samson, of the Naval Wing, successfully practised night flying, without any lights on the machine or the aerodrome; but as a regular business night flying was not taken in hand by the squadrons until well on in the war. During the month of July 1913 Lieutenants R. Cholmondeley and G. I. Carmichael became evangelists for the Flying Corps; they went on a recruiting tour to Colchester, and gave free passenger trips to all likely converts among the officers of the garrison there. Long before this, in 1912, the squadron had begun to train non-commissioned officers to fly. The first of these to get his certificate was Sergeant F. Ridd. He had originally been a bricklayer, but after joining the Air Battalion had developed an extraordinary talent for rigging, and became an all-round accomplished airman. Others who were taught to fly soon after were W. T. J. McCudden, the eldest of the four brothers of that name, and W. V. Strugnell, who, later on, became a flight commander in France. The most famous of the McCuddens, James Byford McCudden, V.C., who brought down over fifty enemy aeroplanes, joined the squadron as a mechanic in 1913, and became