Against such attacks only one measure could be advocated--the measure we had for so long been demanding. It was impossible to patrol adequately all the areas of our voyaging. Guns were served to us and we derived a confidence that the enemy quickly appreciated. We did not expect wholly to reduce his surface action, but we could and did expose him to the risk he had come so far out to sea to avoid. On countless occasions our new armament had effect in keeping him to his depths, with the consequent waste of his mobile battery power. Even in gun action he could no longer impose his own speed power on a slow ship. Under conditions that he judged favourable to his gunnery, the submarine commander still exercised his ordnance--usually after a torpedo had failed to reach its mark. Many of the hazards were against us, but our weapons brought the contest to a less unequal balance. If we did present the larger target, we had--in our steady emplacement--a better platform from which to direct our fire. From the first it was a competition of range and calibre. Six-pounders led to twelves; these in turn gave way to 4.7's. Anon, the enemy mounted a heavier weapon, to which we replied by a new type of 4-inch, sighted to 13,000 yards. Thus armed and equipped, we were in better condition to meet the enemy in our independent sailings. He was again obliged largely to return to the use of his torpedoes, with all the maze of under-water approach that that form of attack involved. If outranged in a surface action, we had our smoke-producing apparatus to set up a screen to his shell-fire, and that form of defence had the added value of forcing him to proceed at a high and uneconomical speed to press an attack. Some of our gun actions resulted in destruction of a sea-pest, but all--however unsuccessful--contributed to lessen his power of offence. Every torpedo fired, every hour of submergence, every knot of speed expended in a chase, was so far a victory for us as to hasten the date when he would be obliged to head back to his base. His chances of survival in that passage through the patrols and the nets and mines could not be considered as good. [Illustration: QUEEN'S DOCK, GLASGOW] X BATTLEDORE AND SHUTTLECOCK "_All vessels are prohibited from approaching within four miles of Rathlin Island between sunset and sunrise_"