Our hydrographical charts are correct enough to guide safely into and out of port any shipmaster who will sound, and can take an angle. As, however, the navigation is easy, so accidents are common. Any land- lubber could steer a ship from Bombay to Karachi (Kurrachee), and yet how many have been lost! Often, too, it is in seamanship as in horsemanship, when the best receive the most and the heaviest falls. In May 1857 the Jonas, belonging to Messrs Vidal, was sunk by mistaking Chumbi Island for its neighbour Bawi. Three or four days afterwards the Storm King of Salem, Messrs Bertram, ran aground whilst hugging Chumbi in order to distance a rival. The number of reefs and shoals render it always unadvisable to enter the port at night, and in the heaviest weather safe riding-ground is found between Zanzibar Island and the continent. [Illustration: ZANZIBAR FROM THE SEA.] Vessels from the south making Zanzibar in the N.E. monsoon, the trade- wind of December to March, leave Europa Island to the west, and the Comoro group and S. Juan de Nova on the east. Keeping well in mid- channel, they head straight for Mafiyah. They hug Point Puna, avoiding Latham’s Bank,[37] and they work up by Kwale and the Chumbi Island. Ships from the north have only to run down the mid-channel, between Pemba and the continent, and then to pass west of Tumbatu. Those sailing southward from Zanzibar at this season pass along-shore, down the Mozambique Channel. Vessels from the south making Zanzibar in May to September, the height of the S.W. monsoon—the anti-N.E. trade—sail up the same passage. They must beware of falling to leeward; and those that neglect ‘lead and look-out’ are ever liable to be carried northwards to Pemba by the counter-current before mentioned, which may, however, now be a wind-current. At this season ship-masters missing the mark have sometimes made 3° to 4° of easting, and have preferred beating down to Mafiyah and running up again, rather than face the ridicule of appearing viâ the northern passage. Those leaving the Island in the S.W. monsoon stand north up channel, well out in E. lon. 9° 42′ to 43′, beat south of Cape Delgado, pass between the Comoro group and the mainland, and thus catch the Mozambique gulfstream. The brises solaires blow strongest off Madagascar in June and July. They fall light in August and September.