Down near the water front one finds a long brick building, three-storeyed and signless, which shuts off all view of the river. The windows, as well as the bricks, are very dirty, and you see no sign of life, unless some smudged workman dodges in through a little door. The place might be a factory for the making of lamps or stair rods, or any ordinary commercial thing. As a matter of fact, the building fronts the shipyard of Yarrow, the builder of torpedo boats, the maker of knives for the nations, the man who provides everybody with a certain kind of efficient weapon. One then remembers that if Russia fights England, Yarrow meets Yarrow; if Germany fights France, Yarrow meets Yarrow; if Chili fights Argentina, Yarrow meets Yarrow.

Besides the above-mentioned countries Yarrow has built torpedo boats for Italy, Austria, Holland, Japan, China, Ecuador, Brazil, Costa Rica, and Spain. There is a keeper of a great shop in London who is known as the Universal Provider. If a general conflagration of war should break out in the world, Yarrow would be known as one of the Universal Warriors, for it would practically be a battle between Yarrow, Armstrong, Krupp, and a few other firms. This is what makes interesting the dinginess of the cantonment on the Isle of Dogs.

The great Yarrow forte is to build speedy steamers of a tonnage of not more than 240 tons. This practically includes only yachts, launches, tugs, torpedo boat destroyers, torpedo boats, and of late shallow-draught gunboats for service on the Nile, Congo, and Niger. Some of the gunboats that shelled the dervishes from the banks of the Nile below Khartoum were built by Yarrow. Yarrow is always in action somewhere. Even if the firm's boats do not appear in every coming sea combat, the ideas of the firm will, for many nations, notably France and Germany, have bought specimens of the best models of Yarrow construction in order to reduplicate and reduplicate them in their own yards.

When the great fever to possess torpedo boats came upon the Powers of Europe, England was at first left far in the rear. Either Germany or France to-day has in her fleet more torpedo boats than has England. The British tar is a hard man to oust out of a habit. He had a habit of thinking that his battleships and cruisers were the final thing in naval construction. He scoffed at the advent of the torpedo boat. He did not scoff intelligently but because, mainly, he hated to be forced to change his ways.

You will usually find an Englishman balking and kicking at innovation up to the last moment. It takes him some years to get an idea into his head, and when finally it is inserted, he not only respects it, he reveres it. The Londoners have a fire brigade which would interest the ghost of a Babylonian, as an example of how much the method of extinguishing fires could degenerate in two thousand years, and in 1897, when a terrible fire devastated a part of the city, some voices were raised challenging the efficiency of the fire brigade. But that part of the London County Council which corresponds to fire commissioners in United States laid their hands upon their hearts and solemnly assured the public that they had investigated the matter, and had found the London fire brigade to be as good as any in the world. There were some isolated cases of dissent, but the great English public as a whole placidly accepted these assurances concerning the activity of the honoured corps.

For a long time England blundered in the same way over the matter of torpedo boats. They were authoritatively informed that there was nothing in all the talk about torpedo boats. Then came a great popular uproar, in which people tumbled over each other to get to the doors of the Admiralty and howl about torpedo boats. It was an awakening as unreasonable as had been the previous indifference and contempt. Then England began to build. She has never overtaken France or Germany in the number of torpedo boats, but she now heads the world with her collection of that marvel of marine architecture—the torpedo boat destroyer. She has about sixty-five of these vessels now in commission, and has about as many more in course of building.

People ordinarily have a false idea of the appearance of a destroyer. The common type is longer than an ordinary gunboat—a long, low, graceful thing, flying through the water at fabulous speed, with a great curve of water some yards back of the bow, and smoke flying horizontally from the three or four stacks.

Bushing this way and that way, circling, dodging, turning, they are like demons.

The best kind of modern destroyer has a length of 220 feet, with a beam of 26½ feet. The horse-power is about 6500, driving the boat at a speed of thirty-one knots or more. The engines are triple-expansion, with water tube boilers. They carry from 70 to 100 tons of coal, and at a speed of eight or nine knots can keep the sea for a week; so they are independent of coaling in a voyage of between 1300 and 1500 miles. They carry a crew of three or four officers, and about forty men.

They are armed usually with one twelve-pounder gun, and from three to five six-pounder guns, besides their equipment of torpedoes. Their hulls and top hamper are painted olive, buff, or preferably slate, in order to make them hard to find with the eye at sea.