You enter the door, and find yourself in a corridor or passage, long and dark, for everything in this building is dark, and gaslight is the only light eighteen hours in the twenty-four; you find yourself in a corridor, I say, running the entire depth of the building, and bringing you back again toward the Rue Lepelletier, which you left on entering the cul de sac, to seek the low entrance below. As you traverse the endless gallery, your attention is arrested by a deep hum, as of many voices at a distance, with which the entire structure seems pervaded, accompanied by a heavier sound, which rises and falls with measured stroke. This mysterious hum might have been heard when you first approached or entered the building; but the silence and solitude of the corridor have caused you to notice it now for the first time, and to wonder at its cause.
Now had you the power of those magicians, necromancers, clairvoyants and demi-devils, whether of the flesh or the spirit, who, at a glance, can gaze through massive walls and peer down the chimneys of a great city, and who, almost without glancing at all, can see through partitions, key-holes and iron doors, your wonder at the cause of these unknown sounds would instantly cease, while it would be yet more excited by those causes themselves, for the vast building all around you, and through which you are passing, and which envelops you in its ceaseless hum, like the voice of a great city, would seem to you nothing less than a leviathan of life and action--a Titan--a Frankenstein--a mental and material giant, with its acoustic tubes, like veins and arteries, running all over the structure, just beneath the surface of the walls, and uniting in every apartment; with its electric wires, like bundles of nerves, which, having webbed the whole body with network, converge into a focus-tube, and thence pass down into the vaults, through the massive foundations, and beneath, the pavements of the thronged streets of the metropolis, and thence, rising again to the surface, branching on distinct, diverse and solitary routes without the suburbs all over Europe. You would see, too, the mighty heart of this Titan, whose heavy heavings you have felt, heard and wondered at--THE PRESS--in its subterranean tenement, amid smoke and flame. THE PRESS; which, like the animal heart, receives eventually all that the veins convey to it, and flings forth everything in modified form through lungs and arteries. Tireless and untired in its action, never ceasing, never resting, for as well might a man think to live when his heart had ceased to beat, as a printing office exist when the throbbings of its press were no longer felt; and as well could a man be supposed to live without breath as a printing-office of the nineteenth century without its lungs, the steam engine, or its breath of life, the subtle fluid by which it is moved.