Samana Bay, at the northeast corner of Santo Domingo, is but one of several fine anchorages in that great island, whose territory is now divided between two negro republics--French and Spanish in tongue. Its selection to figure in our study, to the exclusion of the others, is determined by its situation, and by the fact that we are seeking to take a comprehensive glance of the Caribbean as a whole, and not merely of particular districts. For instance, it might be urged forcibly, in view of the existence of two great naval ports like Santiago de Cuba and Port Royal in Jamaica, close to the Windward Passage, through which lies the direct route from the Atlantic seaboard to the Isthmus, that St. Nicholas Mole, immediately on the Passage, offers the natural position for checking the others in case of need. The reply is that we are not seeking to check anything or anybody, but simply examining in the large the natural strategic features, and incidentally thereto noting the political conditions, of a maritime region in which the United States is particularly interested; political conditions, as has been remarked, having an unavoidable effect upon military values. The inquiry being thus broad, Samana Bay and the island of St. Thomas are entitled to the pre-eminence here given to them, because they represent, efficiently and better than any other positions, the control of two principal passages into the Caribbean Sea from the Atlantic. The Mona Passage, on which Samana lies, between Santo Domingo and Puerto Rico, is particularly suited to sailing-vessels from the northward, because free from dangers to navigation. This, of course, in these days of steam, is a small matter militarily; in the latter sense the Mona Passage is valuable because it is an alternative to the Windward Passage, or to those to the eastward, in case of hostile predominance in one quarter or the other. St. Thomas is on the Anegada Passage, actually much used, and which better than any other represents the course from Europe to the Isthmus, just as the Windward Passage does that from the North American Atlantic ports. Neither of these places can boast of great natural strength nor of resources; St. Thomas, because it is a small island with the inherent weaknesses attending all such, which have been mentioned; Samana Bay, because, although the island on which it is is large and productive, it has not now, and gives no hope of having, that political stability and commercial prosperity which bring resources and power in their train. Both places would need also considerable development of defensive works to meet the requirements of a naval port. Despite these defects, their situations on the passages named entitle them to paramount consideration in a general study of the Caribbean Sea and the Gulf of Mexico. Potentially, though not actually, they lend control of the Mona and Anegada Passages, exactly as Kingston and Santiago do of the Windward.