The Caribbean Sea and the Gulf of Mexico, taken together, form an inland sea and an archipelago. They too have known those mutabilities of fortune which receive illustration alike in the history of countries and in the lives of individuals. The first scene of discovery and of conquest in the New World, these twin sheets of water, with their islands and their mainlands, became for many generations, and nearly to our own time, a veritable El Dorado,—a land where the least of labor, on the part of its new possessors, rendered the largest and richest returns. The bounty of nature, and the ease with which climatic conditions, aided by the unwarlike character of most of the natives, adapted themselves to the institution of slavery, insured the cheap and abundant production of articles which, when once enjoyed, men found indispensable, as they already had the silks and spices of the East. In Mexico and in Peru were realized also, in degree, the actual gold-mine sought by the avarice of the earlier Spanish explorers; while a short though difficult tropical journey brought the treasures of the west coast across the Isthmus to the shores of the broad ocean, nature’s great highway, which washed at once the shores of Old and of New Spain. From the Caribbean, Great Britain, although her rivals had anticipated her in the possession of the largest and richest districts, derived nearly twenty-five per cent of her commerce, during the strenuous period when the Mediterranean contributed but two per cent.