These winds are by some corruptly called the _trade-winds_; but this name given to them is a very erroneous one, and apt to confound narratives, and make them unintelligible. A trade-wind is a wind which, all the year through, blows, and has ever blown, from the same point of the horizon; such is the south-west, south of the Line, in the Indian and Pacific Ocean. On the contrary, these winds, of which we have now spoken, are called _monsoons_; each year they blow six months from the northward, and the other six months from the southward, in the Arabian Gulf: While in the Indian Ocean, without the Straits of Babelmandeb, they blow just the contrary at the same seasons; that is, in summer from the southward, and in winter from the northward, subject to a small inflexion to the east and to the west. The reader will observe, then, that, a vessel sailing from Suez or the Elanitic Gulf, in any of the summer months, will find a steady wind at north-west, which will carry it in the direction of the Gulf to Mocha. At Mocha, the coast is east and west to the Straits of Babelmandeb, so that the vessel from Mocha will have variable winds for a short space, but mostly westerly, and these will carry her on to the Straits. She is then done with the monsoon in the Gulf, which was from the north, and, being in the Indian Ocean, is taken up by the monsoon which blows in the summer months there, and is directly contrary to what obtains in the Gulf. This is a south-wester, which carries the vessel with a flowing sail to any part in India, without delay or impediment. The same happens upon her return home. She sails in the winter months by the monsoon proper to that sea, that is, with a north-east, which carries her through the Straits of Babelmandeb. She finds, within the Gulf, a wind at south-east, directly contrary to what was in the ocean; but then her course is contrary likewise, so that a south-easter, answering to the direction of the Gulf, carries her directly to Suez, or the Elanitic Gulf, to whichever way she proposes going. Hitherto all is plain, simple, and easy to be understood; and this was the reason why, in the earliest ages, the India trade was carried on without difficulty. Many doubts, however, have arisen about a port called _Ophir_, whence the immense quantities of gold and silver came, which were necessary at this time, when provision was making for building the Temple of Jerusalem. In what part of the world this Ophir was has not been yet agreed. Connected with this voyage, too, was one to Tarshish, which suffers the same difficulties; one and the same fleet performed them both in the same season.