The Historians' History of the World 01 [Prolegomena; Egypt, Mesopotamia]

The Philosophers indeed in Memphis have urg’d strong Reasons of the Increase of Nile, which are hard to be confuted; and though they are improbable, yet many agree to them. For they divide the Earth into Three Parts, one of which is that wherein we inhabit; another quite contrary to these Places in the Seasons of the Year; the Third lying between these Two, which they say is uninhabitable by reason of the scorching heat of the Sun; and therefore if Nile should overflow in the Winter-time, it would be clear and evident that its Source would arise out of our Zone, because then we have the most Rain: But on the contrary being that it rises in Summer, it’s very probable that in the Country opposite to us it’s Winter-time, where then there’s much Rain, and that those Floods of Water are brought down thence to us: And therefore that none can ever find out the Head-Springs of Nile, because the River has its Course through the opposite Zone; which is uninhabited. And the exceeding sweetness of the Water, they say, is the Confirmation of this Opinion; for passing through the Torrid Zone, the Water is boil’d, and therefore this River is sweeter than any other in the World; for Heat does naturally dulcorate Water. But this reason is easily refuted; for it’s plainly impossible that the River should rise to that height, and come down to us from the opposite Zone; especially if it be granted that the Earth is round. But if any yet shall be so obstinate as to affirm it is so as the philosophers have said, I must in short say it’s against and contrary to the Laws of Nature.

For being they hold Opinions that in the nature of the things can hardly be disprov’d, and place an inhabitable part of the World between us and them that are opposite to us; they conclude, that by this device, they have made it impossible, and out of the reach of the Wit of Man to confute them. But it is but just and equal, that those who affirm any thing positively, should prove what they say, either by good Authority or strength of Reason. How comes it about that only the River Nile should come down to us from the other opposite Zone? Have we not other Rivers that this may be as well apply’d to? As to the Causes alledg’d for the sweetness of the Water, they are absurd: For if the Water be boyl’d with the parching Heat, and thereupon becomes sweet, it would have no productive quality, either of Fish or other Kinds of Creatures and Beasts; for all Water whose Nature is chang’d by Fire, is altogether incapable to breed any living thing, and therefore being that the Nature of Nile contradicts this decoction and boyling of the Water, we conclude that the Causes alledg’d of its increase are false.

But to the true cause, Agartharchides of Cnidus comes nearest. For he says, that in the Mountainous parts of Ethiopia, there are Yearly continual Rains from the Summer Solstice to the Equinox in Autumn, and therefore there’s just cause for Nile to be low in the Winter, which then flows only from its own natural Spring-heads, and to overflow in Summer through the abundance of Rains. And though none hitherto have been able to give a Reason of these Inundations, yet he says his Opinion is not altogether to be rejected; for there are many things that are contrary to the Rules of Nature, for which none are able to give any substantial Reason. That which happens in some parts of Asia, he says, gives some confirmation to his Opinion. For in the Confines of Scythia, near Mount Caucasus, after the Winter is over, he affirms that abundance of Snow falls every Year for many Days together: And that in the Northern Parts of India, at certain Times, there falls abundance of Hail, and of an incredible Bigness: And that near the River Hydaspis, in Summer-time, it rains continually; and the same happens in Ethiopia for many Days together; and that this disorder of the Air whirling about, occasions many Storms of Rain in Places near adjoyning; and that therefore it’s no wonder if the Mountainous Parts of Ethiopia, which lies much higher than Egypt, are soakt with continual Rains, wherewith the River being fill’d, overflows; especially since the natural Inhabitants of the Place affirm, that thus it is in their Country. And though these things now related, are in their nature contrary to those in our own Climates, yet we are not for that Reason to disbelieve them. For with us the South Wind is cloudy and boysterous, whereas in Ethiopia it’s calm and clear; and that the North Winds in Europe are fierce and violent, but in those Regions low and almost insensible.