Speaking from the point of view of the "gunner-engineer," Sir Percy Girouard lays particular stress on the primary need for gun power. "Gun power to ward off the raider from our unprotected towns and ports; gun power to ward off any attack until the Navy reaches that point, and gun power to prevent landings upon our shores." Alluding next to the utter impossibility of extending "fixed fortifications of a modern type for the defence of every exposed point of our coast" for the obvious reason that "the cost of such an extension would be enormous," Sir Percy goes on to draw attention to the systems of railways in Great Britain and Ireland "which are the admiration of the world." These he contends "suggest the truest and most economical basis for resistance to any aggression or insult to our shores," for whereas "ships and fortifications under modern conditions rapidly become obsolete, our railways are always kept in excellent working order by the Companies concerned without any expense to the Government"; in fact "such would be the elasticity of the system that an enemy would have opposed to him at any exposed point of the coast the armament of a first-class fortress." Obviously a lapse of nearly twenty years cannot fail to witness the introduction of new methods, novel ideas, and alterations in design, and, just as the practical experience gained or bought at the expense of a few weeks of actual warfare went to prove in August, 1914, the worthlessness of modern forts and fortresses which literally crumbled and crumpled under the weight of high-angle high explosives and were quickly superseded by trenches and dug-outs, so, too, it would appear that the engineer and gunner experts were led to rule out of court anything of so cumbersome a nature as would be represented by a "first-class fortress" on wheels, which, too heavy and unwieldy a mass to travel at anything but a snail's pace, could not but afford a first-class target to an approaching enemy warship. Armoured trains were, to some extent, employed during the war in South Africa, chiefly for purposes of reconnoitring, and it was from photographs of these trains which they had in their possession that the military authorities asked Mr. Cooke to evolve a train on similar, though improved, lines; a train one might say more akin to a mobile "pill-box" than a fortress, in that bristling with maxims and rifles it could be relied upon to move at least with the speed of an express goods train, and be capable of extending a "withering" welcome to any venturesome and aspiring raiding-parties at whatever point of the coast they might select as suitable for an attempt at landing.