Besides these natural causes of population and depopulation (which proceed, as we have observed, from a certain turn given to the spirit of a people) there are others which operate with irresistible force, by sudden and violent revolutions. The King of Prussia, for example, attempted to people a country all at once, by profiting of the desertion of the Saltzburgers. America is become very poorly peopled in some spots upon the coast, and in some islands, at the expence of the exportation of millions from Europe and from Africa; such methods never can succeed in proportion to the attempt. Spain, on the other hand, was depopulated by the expulsion of its anti-christian inhabitants. These causes work evident effects, which there is little occasion to explain, although the more remote consequences of them may deserve observation. I shall, in another place, have occasion to examine the manner of our peopling America. In this place, I shall make a few observations upon the depopulation of Spain, and finish my chapter. That country is said to have been antiently very populous under the government of the Moors. I am not sufficiently versed in the politics, oeconomy and manners of that people, to judge how far these might be favourable to population: what seems, however, to confirm what we are told, is, the large repositories they used for preserving grain, which still remain entire, though never once made use of. They watered the kingdoms of Valencia, Murcia and Granada. They gathered themselves into cities of which we still can discover the extent. The country which they now possess (though drier than Spain) furnishes Europe with considerable quantities of grain. The palace of the Moorish King at Granada, shews a taste for luxury. The mosque of Cordoua speaks a larger capital. All these are symptoms of population, but they only help one to guess. The numbers which history mentions to have been driven out, is a better way still of judging, if the fidelity of historians could be depended upon, when there is any question about numbers.