Nevertheless, when compared to Cuba, Jamaica cannot be considered the preponderant position of the Caribbean. The military question of position is quantitative as well as qualitative; and situation, however excellent, can rarely, by itself alone, make full amends for defect in the power and resources which are the natural property of size--of mass. Gibraltar, the synonym of intrinsic strength, is an illustration in point; its smallness, its isolation, and its barrenness of resource constitute limits to its offensive power, and even to its impregnability, which are well understood by military men. Jamaica, by its situation, flanks the route from Cuba to the Isthmus, as indeed it does all routes from the Atlantic and the Gulf to that point; but, as a military entity, it is completely overshadowed by the larger island, which it so conspicuously confronts. If, as has just been said, it by situation intercepts the access of Cuba to the Isthmus, it is itself cut off by its huge neighbor from secure communication with the North American Continent, now as always the chief natural source of supplies for the West Indies, which do not produce the great staples of life. With the United States friendly or neutral, in a case of war, there can be no comparison between the advantages of Cuba, conferred by its situation and its size, and those of Jamaica, which, by these qualities of its rival, is effectually cut off from that source of supplies. Nor is the disadvantage of Jamaica less marked with reference to communication with other quarters than the United States--with Halifax, with Bermuda, with Europe. Its distance from these points, and from Santa Lucia, where the resources of Europe may be said to focus for it, makes its situation one of extreme isolation; a condition emphasized by the fact that both Bermuda and Santa Lucia are themselves dependent upon outside sources for anything they may send to Jamaica. At all these points, coal, the great factor of modern naval war, must be stored and the supply maintained. They do not produce it. The mere size of Cuba, the amount of population which it has, or ought to have, the number of its seaports, the extent of the industries possible to it, tend naturally to an accumulation of resources such as great mercantile communities always entail. These, combined with its nearness to the United States, and its other advantages of situation, make Cuba a position that can have no military rival among the islands of the world, except Ireland. With a friendly United States, isolation is impossible to Cuba.