Animals have marvelous virtues of their own other than the medicinal uses to which men have put them. For instance, the mere glance of the basilisk is fatal, and its breath burns up vegetation and breaks rocks.[281] But the medicinal effects which Pliny ascribes to animals and parts of animals are well nigh infinite. Many animal substances will have to be introduced in other connections so that we need mention now but a very few: the heads and blood of flies, honey in which bees have died, _cinere genitalis asini_, chicks in the egg, and thrice seven centipedes diluted with Attic honey,[282]—this last a prescription for asthma and to be taken through a reed because it blackens every dish by its contact. Another passage advises eating a rat or shrew-mouse in order to bear a baby with black eyes.[283] These items are enough to convince us that the animals and parts of animals employed by the magicians were not one whit more bizarre and nauseating than the others found in the _Natural History_, nor were the cures which they were expected to work any more improbable. In order to illustrate, however, the delicate distinctions which were imagined to exist not only between the virtues of different parts of the same animal, but also between slightly varied uses of the same part, we may note that scales scraped from the topmost part of a tortoise’s shell and administered in drink check sexual desire, considering which, it is, as Pliny remarks, the more marvelous that a powder made of the entire shell is reported to arouse lust.[284] But love turns readily to hatred in magic as well as in romance, and it is nothing very unusual, as we shall find in other authors, for the same thing on slight provocation to work in exactly opposite ways. [Sidenote: The virtues of herbs.] Pig grease, Pliny somewhere informs us, possesses especially strong virtue, “because that animal feeds on the roots of herbs.”[285] From the virtues of animals, therefore, let us turn to those of herbs.[286] Pliny met on every hand assertion of their wonderful powers. The empire-builders of Rome employed the sacred herbs _sagmina_ and _verbenae_ in their embassies and legations. The Gauls, too, use the verbena in lot-casting and prophetic responses.[287] Pliny also states more sceptically that there is another root which diviners take in drink in order to feign inspiration.[288] The Scythians know of a plant which prevents hunger and thirst if held in the mouth, and of another which has the same effect upon their horses, so that they can go for twelve days without meat or drink,[289]—an exaggerated estimate of the hardihood of the mounted Asiatic nomads and their steeds. Musaeus and Hesiod say that one anointed with _polion_ will attain fame and dignities.[290]