The bezoar does not appear to have been used medicinally in Europe before the twelfth century, when the so-called pestilential fevers became very prevalent. In their distress people turned to the lapis bezoar, which was so highly recommended by the Arabic physicians whose works were, at that time, becoming more widely known through the intercourse between the Spaniards and the Moors. Caspar Bauhin writes:[411] “Even to-day princes and nobles prize it very highly and guard it in their treasures among their most precious gems; so that the physicians are forced, sometimes against their better judgment, to employ it as a remedy. So great are its virtues that many imitations are made.” The name bezoar, derived from the Persian _padzahr_ (_pad_, expelling; _zahr_, poison), or some of its many variants, was often used to designate any antidote for poison, so that the Arabs would say that such or such a substance was the bezoar for a particular poison. This should be understood to signify that the stone received its name because it was regarded as a specially powerful antidote. The various authors give many different sources for the bezoar. We have already cited Monardes and repeated his account; other writers asserted that this concretion came from the heads of certain animals, others again said that it was taken from their livers, and still others stated that it was formed in the eye of the stag. Naturally, concretions of a similar form and quality may well have been obtained from any of these sources. Indeed, one of the most potent bezoars was that taken from the monkey. A specimen of this kind is described and figured in the Museum Brittanicum[412] with the following description: A Monkey’s Bezoar, very much resembling one from the goat, of an oblong shape broke in two, with a long straw, or some such like substance in its centre; its colour brown, pink, or deep yellow. I found it set as generally they are for preservation in a little chest, or case, of what is called _Lignum Læevisiunum_; the pith or medula of which appears to resemble the common elder, and may, for what I know, be as curious as the stone itself. Toll quotes[413] Jacob Bontius to the effect that these monkey bezoars, which were rounded and a little longer than the finger, were considered the best of all. As the chief quality claimed for the bezoar was that it induced a profuse perspiration, we might understand that it could have a beneficial effect in some cases. It was also remarked that the solution of the stone blackened the teeth and those who used it were therefore obliged to take great care that the medicine should not touch their teeth. [Illustration: Monkey bezoar. From Valentini’s “Museum Museorum oder Vollständige Schau-Bühne,” Frankfurt am Main, 1714. ]