The infant Paris was born, as everybody knows, in that ancient island in the shape of a cradle, which is now called the City. The banks of that island were its first enclosure; the Seine was its first ditch. For several centuries Paris was confined to the island, having two bridges, the one on the north, the other on the south, the two _têtes-de-ponts_, which were at once its gates and its fortresses--the Grand Chatelet on the right bank and the Petit Chatelet on the left. In process of time, under the kings of the first dynasty, finding herself straitened in her island and unable to turn herself about, she crossed the water. A first enclosure of walls and towers then began to encroach upon either bank of the Seine beyond the two Chatelets. Of this ancient enclosure some vestiges were still remaining in the past century; nothing is now left of it but the memory and here and there a tradition. By degrees the flood of houses, always propelled from the heart to the extremities, wore away and overflowed this enclosure. Philip Augustus surrounded Paris with new ramparts. He imprisoned the city within a circular chain of large, lofty, and massive towers. For more than a century the houses, crowding closer and closer, raised their level in this basin, like water in a reservoir. They began to grow higher; story was piled upon story; they shot up like any comprest liquid, and each tried to lift its head above its neighbors in order to obtain a little fresh air. The streets became deeper and deeper, and narrower and narrower; every vacant place was covered and disappeared. The houses at length overleapt the wall of Philip Augustus, and merrily scattered themselves at random over the plain, like prisoners who had made their escape. There they sat themselves down at their ease and carved themselves gardens out of the fields. So early as 1367 the suburbs of the city had spread so far as to need a fresh enclosure, especially on the right bank; this was built for it by Charles V. But a place like Paris is perpetually increasing. It is such cities alone that become capitals of countries. They are reservoirs into which all the geographical, political, moral, and intellectual channels of a country, all the natural inclined planes of its population discharge themselves; wells of civilization, if we may be allowed the expression, and drains also, where all that constitutes the sap, the life, the soul of the nation, is incessantly collecting and filtering, drop by drop, age by age.