The acme of horror in this direction is perhaps provided by submarines. Slow moving, they have more or less to take up their positions before the battle begins. It is not permitted me to describe exactly how they are worked. I may say, however, that they are manoeuvred on a separate board, and work blindly enough; for all that the player of a submarine sees of the battlefield is what he can find reflected in a tiny mirror. He has, in fine, to guess a great deal as to the course and distance of the enemy from the spot corresponding to that on which he is supposed to be, which reproduces the conditions under which a periscope is used fairly accurately. If a submarine can get within a square (one hundred yards) of a ship, that ship is allowed torpedoed. Nothing is allowed for the chance of the boat being seen by the ship, the assumption being that these chances are too small to be worth consideration; at any rate, till such time as it is too late for the ship to do anything. This looks like an easy time for the submarine, but it is not so comfortable in reality, because destroyers and picket-boats may be with the enemy. Should a destroyer at any time pass within a hundred yards of the submarine, it is exit submarine! In the British Navy the official home of the naval war game is at Greenwich Naval College, where captains play it during the "war course." In the United States the War College is its home. Its real British head-quarters are at Portsmouth, where a voluntary society plays it twice a week. Admiral Sir John Hopkins is the president of this association, and Mr. Fred. T. Jane, the inventor, its secretary. Both naval and military officers are eligible for membership, and, as far as possible, junior officers only. At the "war course" tactics are the principal study, but at Portsmouth tactics play a minor part. "Tactics cannot be taught by naval war game, save in a very general way," is the dictum of the inventor. "The Portsmouth Naval War-Game Society exists for quite different objects. It aims chiefly at teaching the guns and armour of possible enemies; and for the rest tries to train officers to think out war problems, to train them to think things quickly, and to exhibit resource, to learn the value of all the vital side issues of war, such as international law or the keeping up of communications, and so forth. There is no such thing as the abstract right or wrong move in war; to do a more or less wrong thing at once may often be better than doing a better thing a little later. 'Act' is the motto that the society strives to inculcate."