must grow from one root conjoyned, otherwise they are not precious, and the beast must neither be a young one nor one very old, but in the mean betwixt both, being in vigor and perfection of strength.
The Beavers of Spain yeeld not such virtuous Castoreum as they of Pontus, and therefore if it be possible, take a Pontique Beaver, next one of Gallatia, and lastly of Africk. Some do corrupt them putting into their skin Gum and Ammoniack with blood, other take the reins of the beast, and so make the Castoreum very big, which in it self is but small. This beast hath two bladders, which I remember not are in any other living creature, and you must beware that none of these be joyned to the Castoreum. You may know if it be mingled with Ammoniack by the tast, for although the colour be like, yet is the savour different. Platearius sheweth, that some adulterate Castoreum, by taking off his skin, or some cod newly taken forth of another beast, filling it with bloud, sinews and the powder of Castoreum, that so it may not want his strong smell or favour: other fill it with earth and bloud: other with bloud, rosen, gum, sinews and pepper, to make it tast sharp: but this is a falsi∣fication discernible, and of this sort is the Castoreum which is sold in Venice, as Brasovala affirmeth: and the most of them sold at this day are bigger then the true Castoreum, for the just weight of the right stones is not above twelve ounces and a half, one of them being bigger then the other, be∣ing six fingers breadth long, and four in breadth. Now the substance contained in the bag is yellowish, solid like wax, and sticking like glew, not sharp and cracking betwixt the teeth (as the counterfeit is). These stones are of a strong and stinking savour, such as is not in any other, but not rotten and sharp, as Grammarians affirm; yer I have smelled of it dryed, which was not un∣pleasant, and things once seasoned with the savour thereof, will ever tast of it, although they have not touched it, but lie covered with it in the same box or pot; and therefore the Castoreum of Persia is counterfeit, which hath no such smell, for if a man smell to the right Castoreum, it will draw bloud out of his nose.
After it is taken forth from the beast, it must be hung up in some place to be dryed in the shadow, and when it is dry, it is soft and white: it will continue it strength six years, and some say seven; the Persians affirm, that their Castoreum will hold his virtue ten years, which is as false as the matter they speak of is counterfeit. Archigenes wrote a whole book of the virtue of this Castoreum, whereunto they may resort, that require an exact and full declaration of all his medicinal operati∣ons: it shall only be our purpose, to touch some general heads, and not to enter into a particular discovery thereof.
Being so dryed as is declared, it must be warily used, for it falleth out herein as in other medici∣nal subjects, that ignorance turneth a curing herb or substance, into a venemous and destructive quality; therefore we will first of all set down the dangers to be avoided, and afterward some par∣ticular cures that come by the right use of it. Therefore it must be understood that there is poyson in it, not naturally, but by accident, as may be in any other good and wholesome matter: and that especially in the smell or savour thereof, whereunto if a woman with childe do smell, it will kill the childe unborn and cause abortment; for a womans womb is like a creature, nourished with good favours, and destroyed with evill: therefore burning of feathers, shoo-soles, woollen clothes, pitch, Galbanum, gum, onions, and garlick is noysom to them. It may be corrupted not only as is before declared; but also, if it be shut up close without vent into pure aire, when it is hanged up to be dryed, or if the bag be kept moist, so that it cannot dry; and it is true (as Avicen saith) that if it: be used being so corrupted, it killeth within a dayes space, driving one into madness, making the sick person continually to hold forth his tongue, and infecting him with a Fever by inflaming the body, loosing the continuity of the parts, through sharp vapors arising from the stomach: and for a proof that it will inflame, if you take a little of it mingled with oil, and rub upon any part of the body, or upon your nail, you shall feel it.
But there is also a remedy for it being corrupted; namely, Asses milk mingled with some sharp syrup of Citron, or if need require, drink a dram of Philons Antidote at the most; or take but∣ter and sweet water which will cause vomit, and vomit therewith so long, as you feel the savour of the stone, and afterward take syrup of Limmons or Citrons: and some affirm upon experience, that two penny weight of Coriander-seed, scorched in the fire, is a present remedy for this evill. And it is most strange, that seeing it is in greatest strength, when the favour is hottest, which is very displeasing to a mans nature in outward appearance, yet doth it never harm a man taken inwardly, (being pure and rightly compounded) if the person be without a Fever, for in that case only it doth hurt inwardly, otherwise apply it to a moist body lacking refrigeration, or to a cold body wanting excalfaction, or to a cold and moist body, you shall perceive an evident commodity thereby, if there be no Fever: and yet it hath profited many where the Fever hath not been over hot, as in Extasies and Lethargies, ministred with white Pepper, and Melicrate, and with Rose cakes laid to the neck or head. The same virtues it hath being outwardly applyed and mingled with oil, if the bodies be in any heat, and purely without oil, if the body be cold, for in heating it holdeth the third degree, and in drying the second. The manner how it is to be administred is in drink, for the most part, the sweet liquor being taken from it, and the little skins appearing therein cleansed away, and so it hath among many other these operations following. Drunk with Vinegar, it is good against all venom of Serpents, and against the Chameleon, but with this difference, against the Scor∣pion with wine, against Spiders with sweet water, against the Lizzards with Myrtite, against Dipsas and Cerastes, with Oponax, or wine made of Rew, and against other-Serpents with wine simply.