The Admiral proclaimed the grim philosophy of this war when he told our men that it would be their first duty, should they see a ship torpedoed, not to go to the rescue of the survivors, but to go after the submarine. The three imperative duties of the destroyers were, in the order named: first, to destroy submarines; second, to convoy and protect merchant shipping; and third, to save the lives of the passengers and crews of torpedoed ships. No commander should ever miss an opportunity to destroy a submarine merely because there were a few men and women in small boats or in the water who might be saved. Admiral Bayly explained that to do this would be false economy: sinking a submarine meant saving far more lives than might be involved in a particular instance, for this vessel, if spared, would simply go on constantly destroying human beings. The Admiral then gave a large number of instructions in short, pithy sentences: "Do not use searchlights; do not show any lights whatever at night; do not strike any matches; never steam at a slower rate than thirteen knots; always zigzag, thereby preventing the submarine from plotting your position; always approach a torpedoed vessel with the sun astern; make only short signals; do not repeat the names of vessels; carefully watch all fishing vessels--they may be submarines in disguise--they even put up masts, sails, and funnels in this attempt to conceal their true character." The Admiral closed his remarks with a warning based upon his estimate of the character and methods of the enemy. In substance he said that were it not for the violations of the dictates of humanity and the well-established chivalry of the sea, he would have the greatest respect for the German submarine commanders. He cautioned our officers not to underrate them, and particularly emphasized their cleverness at what he termed "the art of irregularity." He explained this by saying that up to that time he had been unable to deduce from their operations any definite plan or tactics, and advised our commanders also to guard against any regularity of movement; they should never, for example, patrol from one corner to another of their assigned squares in the submarine zone, or adopt any other uniform practice which the enemy might soon perceive and of which he would probably take advantage. At the very moment that Admiral Bayly was giving these impressive instructions the submarine campaign had reached its crisis; the fortunes of the Allies had never struck so low a depth as at that time. An incident connected with our arrival, not particularly important in itself, brought home to our men the unsleeping vigilance of the enemy with whom they had to deal.