The most successful raid is always the silent one if you have dependable troops. The chief obstacle is the enemy wire, but beforehand the artillery can cut this in many places, and machine-guns can be ranged on these gaps to prevent their being repaired. The enemy does not know, even if he suspects a raid, exactly where it will come. It is even a good idea if you only have a small party to enter one of these gaps, crawl down fifty yards inside the wire before attacking, and, when finished, come out through another gap lower down, but every man of the party needs to scout over the ground beforehand so there will be no confusion during the attack. We have carried out successful raids in this manner when none but the Germans who were attacked knew anything of what was going on until we were back in our own trenches, and rarely were there any of these who could give evidence except by means of their dead bodies. I remember that one of our men, who was champion wood-chopper of Australia before the war, drove his bayonet through a German and six inches into a hardwood beam, and as he could not withdraw it had to unship it, leaving the German stuck up there as a souvenir of his visit. Probably not another man in the army could have done it, but it no doubt added to the reputation of the Australians, as these Fritzes must have thought us a race of Samsons. There is a strong bond between us and the airmen, and the army's pair of eyes are focussed together, for the information from both sources is co-ordinated. Our trench maps are constructed chiefly from aeroplane photographs, and it was only occasionally that some object would be seen in the photograph that could not be identified; when we scouts would have to crawl over to it and find out its family-tree. All our intelligence officers are given schooling in aerial observation, and I have been several times over the German lines with a pilot, and have a very high admiration for these birdmen who are not merely the bravest of the brave but princes of good fellows. I had some wonderful aeroplane photographs of some of our attacks wherein I could recognize the stages of our progress, and so expert has this work become that a German soldier can hardly even brush away a fly without a permanent record of it being obtained. Probably the greater number of our aeroplanes on the battle-front are engaged in ranging for the artillery, and in actual offensive warfare, but their greatest value is in reconnoissance, and so it will always be.