The gulf of Mexico, the bay of Honduras on the eastern side, the Pacific on the western, with the immense inlet or sea of California, afford to this rich and fertile viceroyalty the favourable opportunities for the most extensive commerce, were it not that it is greatly impeded by the want of numerous roads across the elevated land of the interior; these, however, are gradually opening; and in proportion as the Spaniards exert themselves in forming them, so will the commerce of Mexico increase in value above that of the neighbouring continental states, with whom, at present, it is, for this cause alone, unable to enter into competition. The distance in some parts of New Spain, from ocean to ocean is very inconsiderable; and some rivers which run from opposite sides of the same mountain approach so near, at their sources, to each other, as to offer to an enterprising people every facility for internal navigation; at present, the commerce of these colonies is tardily carried on from the coasts of the Pacific, to those of the Atlantic by means of mules, which travel in cavalcades along the roads crossing the chain, or by Indians carrying burdens on their backs. The commerce of New Spain centres chiefly at the port of Acapulco in the Pacific, to which the vessels from Manilla bring the productions of the East Indies, which, with the commercial articles of the country itself, are transported over the mountains to Vera Cruz, the Atlantic port, from whence they proceed to the Havannah, and to Europe. We have related what the vegetable and animal kingdoms chiefly furnish towards this trade; it now remains to state the share which the mineral kingdom affords. New Spain is probably richer in productions of this nature than any other country of the world; but for want of the mechanical means which are so extensively employed in raising the metals of Europe, the produce of the Mexican mines, as well as of all those of the New World, is not so great as has been usually imagined, many of the richest veins having been abandoned (after enormous expences and labour employed in opening them), on account of water gaining on the operations of the miners. That useful and surprising instrument the steam-engine, requires to be introduced generally into the mining system of the Americans, before any great accumulations of the precious and useful metals can be had on that continent; then also will the terrible labour of those unfortunate people, who carry on their backs, in baskets, from the depths of these heated caverns, the ores which are there discovered, to the surface, be discontinued; the human race will sensibly increase, and the sterile wastes and thick forests will give way to the arts of agriculture.