The Red Sea does not receive any river whose motion might oppose the tides, whereas the Persian Gulph receives three very considerable ones in its most projecting extremity. It appears very apparently that the Red Sea has been formed by an eruption of the ocean, for the bearing of the lands are exactly similar, the coasts on each side of the straits follow the same direction,, and evidently appear to have been cut by waters. At the extremity of the Red Sea is that famous neck of land called the Isthmus of Suez, which forms a barrier to the Red Sea, and prevents its communication with the Mediterranean. In a preceding article we noticed the reasons which inclined us to think that the Red Sea is higher than the Mediterranean, and that if the Isthmus of Suez was cut, an inundation and an augmentation of the latter might ensue. To which we shall subjoin, that if even it should not be agreed that the Red Sea is higher than the Mediterranean, it cannot be denied that there is neither flux nor reflux in the Mediterranean, adjoining to the mouths of the Nile; and that, on the contrary, in the Red Sea the tides are very considerable, and raise the water several feet, which circumstance alone would suffice to send a quantity of water into the Mediterranean if the Isthmus was broken. Besides, we have an example on this subject quoted by Varenius, who says in page 100 of his Geography: "Oceanus Germanicus, qui est Atlantici pars, inter Frisiam & Hollandium se effundens, efficit sinum, qui et si parvis sit respectu celebrium sinum maris, tamen & ipse dicitur mare, alluitque Hollandiæ emporium celeberrimum, Amstelodamum. Non procul inde abest lacus Harlemensis, qui etiam mare Harlemense dicitur. Hujus altitudo non est minor altitudine sinus illius Belgici, quem diximus & mittit ramum ad urbem Leidam, ubi in varias fossas divaricatur. Quoniam itaque nec lacus his, neque sinus ille Hollandici maris inundant adjacentes agros (de naturali constitutione loquor, non ubi tempestatibus urgentur, propter quas aggeres facti sunt) pater inde, quod non sint altiores quam agri Hollandiæ. At vero Oceanum Germanicum esse altiorem quam terras hasce, experti sunt Leidenses, cum suscepissent fossam seu alveum ex urbe sua ad Oceani Germanici littora, prope Cattorum vicum perducere (distantia est duorum milliarum) ut, recepto per alveum hunc mari, possent navigationem instituere in Oceanum Germanicum, & hinc in varias terræ regiones. Verumenimvero cum magnam jam alvei port em perfecissent, desistere coacti sunt, quoniam turn demum per observationem cognitem est, Oceani Germanici aquam esse altiorem quam agrum inter Leidam et litus Oceani istius; unde locus ille, ubi fodere desierunt dicitur, _Het malle Gat_. Oceanus itaque Germanicus est aliquantum altior quam sinus ille Hollandicus, &c." Therefore, as the German Sea is higher than that of Holland, there is no reason why we should not believe the Red Sea may be higher than the Mediterranean. Herodotus and Diodorus