In the matters of entrance to the Caribbean, and of general interior control of that sea, Jamaica has a singularly central position. It is equidistant (500 miles) from Colon, from the Yucatan Channel, and from the Mona Passage; it is even closer (450 miles) to the nearest mainland of South America at Point Gallinas, and of Central America at Cape Gracias-a-Dios; while it lies so immediately in rear of the Windward Passage that its command of the latter can scarcely be considered less than that of Santiago. The analogy of its situation, as a station for a great fleet, to that for an army covering a frontier which is passable at but a few points, will scarcely escape a military reader. A comparatively short chain of swift lookout steamers, in each direction, can give timely notice of any approach by either of the three passages named; while, if entrance be gained at any other point, the arms stretched out towards Gallinas and Gracias-a-Dios will give warning of transit before the purposes of such transit can be accomplished undisturbed. With such advantages of situation, and with a harbor susceptible of satisfactory development as a naval station for a great fleet, Jamaica is certainly the most important single position in the Caribbean Sea. When one recalls that it passed into the hands of Great Britain, in the days of Cromwell, by accidental conquest, the expedition having been intended primarily against Santo Domingo; that in the two centuries and a half which have since intervened it has played no part adequate to its advantages, such as now looms before it; that, by all the probabilities, it should have been reconquered and retained by Spain in the war of the American Revolution; and when, again, it is recalled that a like accident and a like subsequent uncertainty attended the conquest and retention of the decisive Mediterranean positions of Gibraltar and Malta, one marvels whether incidents so widely separated in time and place, all tending towards one end--the maritime predominance of Great Britain--can be accidents, or are simply the exhibition of a Personal Will, acting through all time, with purpose deliberate and consecutive, to ends not yet discerned.