of the central fire, as it were, a forge of the Cyclops, hot enough to liquefy granite, and the outer cold, which was sufficient to solidify oxygen and nitrogen, they had at their disposal the most enormous extremes in temperature, and consequently thermic cataracts by the side of which all the cataracts of Abyssinia and Niagara were only toys. What caldrons did they own in the ancient volcanoes! What condensers in the glaciers! At first sight they must have seen that if a few distributing agencies of this prodigious energy were provided, they had power enough there to perform the whole work of mankind--excavation, air supply, water supply, sanitation, locomotion, descent and transport of provisions, etc. I am well aware of that. I am further aware that ever favoured by fortune, the inseparable friend of daring, the new Troglodytes have never suffered from famine, nor from shortness of supplies. When one of their snow-covered deposits of carcasses threatened to give out, they used to make several trial borings, drive several shafts in an upward direction. They never failed presently to meet with rich finds of food reserves, extensive enough to close the mouths of the alarmists, whereby there resulted on each occasion, according to the law of Malthus, a sudden increase in the population, coupled with the excavation of new underground cities, more flourishing than their older sisters. But, in spite of all this, we remain overwhelmed with wonder when we consider the incalculable degree of courage and intelligence lavished on such a work, and solely called into being by an idea which, starting one day from one individual brain, has leavened the whole globe. What giant falls of earth, what murderous explosions, what a death-roll there must have been at the outset of the enterprise! We shall never know what bloodthirsty duels, what rapes, what doleful tragedies, took place in this lawless society, which had not yet been reorganised. The history of the early conquerors and colonists of America, if it could be told in detail, would pale entirely beside it. Let us draw a veil over the proceedings. But this pitch of horrors was perhaps necessary to teach us that in the forced intimacy of a cave there is no mean between warfare and love, between mutual slaughter or mutual embraces. We began by fighting; to-day we fall on each other's necks. And in fact, what human ear, nose, or stomach could have longer withstood the deafening roar and smoke of melanite explosions beneath our crypts; the sight and stench of mangled bodies piled up within our narrow confines? Hideous and odious, revolting beyond all expression, the underground war finished by becoming impossible.