Coming to minerals we find Pliny rather more reticent in regard to strange qualities. His account of gems is written mainly from the jeweler’s point of view. When marvelous powers are mentioned, the magi are usually made responsible, and such powers are frequently rejected as absurd. Pliny, however, grants some magic properties in certain stones. Molochitis, by some medicinal power which it possesses, guards infants against dangers;[83] and eumecas, placed beneath the head at night, causes oracular visions.[84] To water Pliny allows powers which we must regard as magical, for according to him certain rivers pass under the sea because of their hatred of it.[85] In man, moreover, as well as in other creatures upon earth, there is magic power. Pliny mentions men whose eyes are able to exert strong fascination,[86] others who fill serpents with terror and can cure snake-bite by merely touching the wound, and others who by their presence addle eggs in the vicinity.[87] Pliny takes up the power of words and incantations in connection with man. Whether they have potency beyond what we expect ordinary speech to possess is a great and unanswered question. Our ancestors, Pliny says, always believed so, and in every-day life we often unconsciously accept such a view ourselves. If, for instance, we believe that the Vestal virgins can, by an imprecation, stop runaway slaves who are still within the city limits, we must accept the whole theory of the power of words. But, taken as individuals, the wisest men lack faith in the doctrine.[88] Pliny, then, believed in the possession of magic properties by well-nigh all varieties of terrestrial substances, nay even by colors and numbers, and in strange relations of occult sympathy, love and hatred between different things in the realm of nature. His acceptance of ceremony as efficacious has also been brought out to some extent. We have seen him attributing importance to death from a single wound, to suspension by a single hair, to fastening an amulet without the patient’s knowledge, or to the absence for a time from the patient’s sight of the person who attached it. We will consider one or two more such instances among the many which exist in his pages.