The railroads leading westward from that city, converging upon the termini of the Pacific lines, continue this world-route of the incoming era to San Francisco, and there, through the Golden Gate, we grasp the wealth of Eastern Asia, whence the first great world-route started. Events more powerful than tradition have thus revolutionized the old system of travel and commerce, calling them eastward. America becomes at once interoceanic and mediterranean, commanding the two oceans, and mediating between Europe and Asia. By the Pacific Railroad, Hong Kong via New York is only forty days distant from London. The tea and silks of China and the products of the Spice Islands must pass through America to Europe. In this connection, also, there is a profound significance in our alliance, every year growing stronger, with Russia, whose extreme southern boundary joins Japan, our latest and warmest Asiatic ally. But the development of American commercial power as against the world is secondary to the internal development of our own resources, and to the indissoluble bond of national union afforded by this inland route from the Atlantic to the Pacific, and by its future connections with every portion of our territory. In thirty years, California will have a population equal to that of New York to-day, and yet not be half full, and the city of St. Louis will number a million of souls. New York City and San Francisco, as the two great _entrepôts_ of trade; Chicago and St. Louis as its two vital centres; and New Orleans at the mouth of our great national canal, the Mississippi,--will become nations rather than cities, out-stripping all the great cities of ancient and modern history. As far as the resources of the West are concerned, one Pacific railroad, with two or three branches, will not suffice; we may need a road along every parallel. The West is still in a large degree _terra incognita_. We know it only in parts. We are indeed aware that California is already competing with Russia and the cis-Mississippi States in the production of cereals, and that the mineral region of the West now annually yields gold and silver worth one hundred millions of dollars. But California's agricultural resources are almost untouched; while the best "leads" of the vast mineral region are not worked, from the fear of a savage race. Missouri extends over thirty-five millions of acres of arable land, two millions of which are the alluvial margins of rivers, and twenty thousand high rolling prairie; but five sevenths of the soil is yet fallow. We see Denver and other cities of the Far West spring up in a day; but their growth, marvellous as it is, arises from the circumstance that they are great mineral centres, and is cramped and partial, depending upon a wearisome and insecure overland route, extending over hundreds of miles, via Salt Lake, to Atchison. The Pacific Railroad will quicken this development to its full