Though the vast estuary, which receives the Hudson and so many minor streams, is chiefly made by an indentation of the continent, that portion of it which forms the port of New-York is separated from the ocean by the happy position of its islands. Of the latter, there are two, which give the general character to the basin, and even to a long line of coast; while several, that are smaller, serve as useful and beautiful accessories to the haven and to the landscape. Between the bay of Raritan and that of New-York there are two communications, one between the islands of Staten and Nassau, called the Narrows, which is the ordinary ship-channel of the port, and the other between Staten and the main, which is known by the name of the Kilns. It is by means of the latter, that vessels pass into the neighboring waters of New-Jersey, and have access to so many of the rivers of that state. But while the island of Staten does so much for the security and facilities of the port, that of Nassau produces an effect on a great extent of coast. After sheltering one half of the harbor from the ocean, the latter approaches so near the continent as to narrow the passage between them to the length of two cables, and then stretching away eastward for the distance of a hundred miles, it forms a wide and beautiful sound. After passing a cluster of islands, at a point which lies forty leagues from the city, by another passage, vessels can gain the open sea. The seaman will at once understand, that the tide of flood must necessarily flow into these vast estuaries from different directions. The current which enters by Sandy-Hook (the scene of so much of this tale) flows westward into the Jersey rivers, northward into the Hudson, and eastward along the arm of the sea that lies between Nassau and the Main. The current, that comes by the way of Montauk, or the eastern extremity of Nassau, raises the vast basin of the Sound, fills the streams of Connecticut, and meets the western tide at a place called Throgmorton, and within twenty miles of the city.