The Royal Flying Corps is becoming more and more an indispensable factor in combined operations. In co-operation with the artillery, in particular, there has been continuous improvement both in the methods and in the technical material employed. The ingenuity and technical skill displayed by the officers of the Royal Flying Corps in effecting this improvement have been most marked. Since my last dispatch there has been a considerable increase both in the number and in the activity of German aeroplanes in our front. During this period there have been more than sixty combats in the air, in which not one British aeroplane has been lost. As these flights take place almost invariably over or behind the German lines, only one hostile aeroplane has been brought down in our territory. Five more, however, have been definitely wrecked behind their own lines, and many have been chased down and forced to land in most unsuitable ground. In spite of the opposition of hostile aircraft, and the great number of anti-aircraft guns employed by the enemy, air reconnaissance has been carried out with regularity and accuracy. I desire to bring to your Lordship's notice the assistance given by the French military authorities, and in particular by General Hirschauer, Director of the French Aviation Service, and his assistants, Colonel Bottieaux and Colonel Stammler, in the supply of aeronautical material, without which the efficiency of the Royal Flying Corps would have been seriously impaired. In this dispatch I wish again to remark upon the exceptionally good work done throughout this campaign by the Army Service Corps and by the Army Ordnance Department, not only in the field, but also on the lines of communication and at the base ports. To foresee and meet the requirements in the matter of ammunition, stores, equipment, supplies, and transport has entailed on the part of the officers, non-commissioned officers and men of these services a sustained effort which has never been relaxed since the beginning of the war, and which has been rewarded by the most conspicuous success. The close co-operation of the Railway Transport Department, whose excellent work, in combination with the French Railway Staff, has ensured the regularity of the maintenance services, has greatly contributed to this success. The degree of efficiency to which these services have been brought was well demonstrated in the course of the second battle of Ypres. The roads between Poperinghe and Ypres, over which transport, supply and ammunition columns had to pass, were continually searched by hostile heavy artillery during the day and night; whilst the passage of the canal through the town of Ypres, and along the roads east of that town, could only be effected under most difficult and dangerous conditions as regards hostile shell fire. Yet, throughout the whole five or six weeks during which these conditions prevailed the work was carried on with perfect order and efficiency.