Arabs, a steamer has nothing to fear, for by keeping mid-stream at the rate they go, no Arab would touch them or attempt to do it. The present vessels they have no power over in going down, but when they are dragged up by Arab trackers, then they are easily attacked. As to the second objection, the want of water, there appears no insurmountable difficulty here, as all the heavy ordnance from Constantinople were brought down the Euphrates from Beer, on rafts, or, as they are called, kelecks; these, independent of their width, being greater than that of a steamer, actually draw more water when heavily laden. There does not appear to be more than one place where there is a doubt, and that is at El Dar, the ancient Thapsacus, where we understand at one season, when the waters are at the lowest point, a camel can hardly go over; but still, perhaps, further information may be desirable. The Pasha has entered very heartily into this plan, and offered either to clear out an old canal, or to cut a new one between this river and the Euphrates. The mouth of the Euphrates is one extended marsh, which forms the best rice-grounds of the country. The distance between the two rivers at this place is about thirty miles. Mr. James Taylor thinks that travellers may reach England from this in twenty-three days, and Bombay in twelve: should this ever take place, steam boats will be passing twice a month up and down this river with passengers from India and England; the effects of such a change, both moral, spiritual, and political, none can tell, but that they must be great every one may see. I have been this morning talking with my Moolah about the two rivers, as to their capability of steam navigation. He decidedly gives the preference to the Euphrates, and says, that the average depth is the height of two men, or ten feet--even till considerably above Beer; but that the Tigris, above Mousul, is very shallow.[10] [10] We have since discovered, by a survey of the Tigris, that in its present state it will be only navigable to Mosul during seven months in the year, from ledges of rock that pass across the river.