Egypt, in order to obtain a knowledge of the Egyptian sciences, returned with only a knowledge of nature and religion, and some rational ideas of their ancient symbols. But it can hardly be doubted, that magic in its grossest and most ridiculous sense was practised in Egypt, at least among some of the vulgar, long before Pythagoras or Empedocles travelled into that country. The Egyptians had been very early accustomed to vary the signification of their symbols, by adding to them several plants, ears of corn, or blades of grass, to express the different employments of husbandry; but understanding no longer their meaning nor the words that had been made use of on these occasions, which were equally unintelligible, the vulgar might mistake these for so many mysterious practices observed by their fathers; and hence they might conceive the notion, that a conjunction of plants, even without being made use of as a remedy, might be of efficacy to preserve or procure health. "Of these," adds the Abbé Pluche, "they made a collection, and an art by which they pretended to procure the blessings, and provide against the evils of life." By the assistance of these, men even attempted to hurt their enemies; and indeed the knowledge of poisonous or useful simples, might on particular occasions give sufficient weight to their empty curses and innovations. But these magic incantations, so contrary to humanity, were detested, and punished by almost all nations; nor could they be tolerated in any. Pliny, after mentioning an herb, the throwing of which into an army, it was said, was sufficient to put it to the route, asks, where was this herb when Rome was so distressed by the Cambri and Teutones? Why did not the Persians make use of it when Lucullus cut their troops to pieces?