Our survey embraced the western shore only, from Cape Kami-Saki to Beacon point. We had no opportunity of examining the eastern side. The soundings from Treaty point across in an E. S. E. direction are regular, and three fathoms were found about a mile and a half from the opposite shore. Of Uraga channel, a reconnoissance was made of the western shore only. During our stay in the bay, from the 17th February to the 18th April, the weather was generally fine, being occasionally interrupted by strong winds and heavy rain. The gales came up suddenly from the southward and westward with a low barometer, and continued for a short time, when the wind hauled round to the northward and westward, and moderated. We had no easterly blows; in fact, the wind was rarely from this quarter, except when hauling round from the northward (as it invariably did) by east to the southward and westward. The tide is quite strong out in the bay; and off the tail of Saratoga spit, Perry island, and Cape Kami-Saki, its velocity is much increased. But at the anchorage in the bay of Yokuhama it was scarcely felt. At Yokuhama the Japanese, authorities supplied us with wood and water, and a few vegetables, fowls, eggs, oysters, and clams. Latitude, Cape Sagami 35° 06′ 30″ Longitude, ” 139° 40′ Latitude, Webster Island 35° 18′ 30″ Longitude, ” ” 139° 40′ 34″ Latitude of Treaty building, north end of Yokuhama 35° 26′ 44″ Longitude, ” ” 139° 40′ 23″ Variation 25′ westerly. High Water, F. and C 6 hours. Rise and fall at Yokuhama 6 feet. SAILING DIRECTIONS FOR THE PORT OF HAKODADI. BY LIEUTENANT WM. L. MAURY, U. S. N. UNITED STATES STEAM-FRIGATE MISSISSIPPI, AT SEA, _July 20, 1854_. This splendid and beautiful bay, which for accessibility and safety is one of the finest in the world, lies on the north side of the straits of Sangar, which separate the Japanese islands of Nippon and Yeso, and about midway between Cape SirijaSaki[5] (the N. E. point of Nippon), and the city of Matsmai. It bears from the cape N. W. ½  W., distant about 45 miles, and is about 4 miles wide at the entrance, and 5 miles deep. [5] Saki, in the Japanese language, means Cape, consequently it should more properly be called Cape Sirija; but to prevent mistakes it has been thought advisable to adopt the Japanese names. The harbor is the southeastern arm of the bay, and is completely sheltered, with regular soundings and excellent holding ground. It is formed by a bold-peaked promontory, standing well out from the high land of the main, with which it is connected by a low sandy isthmus, and which, appearing at a distance as an island, may be easily recognised.