Their future advancement is to come in like manner: not through a prestige derived from their history; not by the gradual increments of their wealth, already collected; not by the riches which they invite to themselves from other cities and distant coasts; not even from their beautiful fortune of location; but by prosperous manufactures prosecuted in them; by the traffic which radiates over the country; by the foreign commerce which, in values increasing every year, seeks this harbor. Each railway whose rapid wheels roll hither, from East or West, from North or South, from the rocks of Newfoundland or the copper-deposits of Lake Superior, from the orange groves of Florida, the Louisiana bayous, the silver ridges of the West, the Golden Gate, gives its guaranty of growth to the still young metropolis. On the cotton fields of the South, and its sugar plantations; on coal mines, and iron mines; on the lakes which winter roofs with ice, and from which drips refreshing coolness through our summer; on fisheries, factories, wheat fields, pine forests; on meadows wealthy with grains or grass, and orchards bending beneath their burdens, this enlarging prosperity must be maintained; and on the steamships, and the telegraph lines, which interweave us with all the world. The swart miner must do his part for it; the ingenious workman, in whatever department; the ploughman in the field, and the fisherman on the banks; the man of science, putting Nature to the question; the laborer, with no other capital than his muscle; the sailor on the sea, wherever commerce opens its wings. Our Arch of Triumph is, therefore, fitly this Bridge of Peace. Our Brandenburg Gate, bearing on its summit no car of military victory, is this great work of industrial skill. It stands, not, like the Arch famous at Milan, outside the city, but in the midst of these united and busy populations. And if the tranquil public order which it celebrates and prefigures shall continue as years proceed, not London itself, a century hence, will surpass the compass of this united city by the sea, in which all civilized nations of mankind have already their many representatives, and to which the world shall pay an increasing annual tribute. And so the last suggestion comes, which the hour presents, and of which the time allows the expression. It was not to an American mind alone that we owed the "Monitor," of which I have spoken, but also to one trained in Swedish schools, the Swedish army, and representing that brave nationality. It is not to a native American mind that the scheme of construction carried out in this Bridge is to be ascribed, but to one representing the German peoples, who, in such enriching and fruitful multitudes, have found here their home. American enterprise, American money, built them both. But the skill which devised, and much, no doubt, of the labor which wrought them, came from afar.