Galen’s medicinal simples include the bile of bulls, hyenas, cocks, partridges, and other animals.[771] A digestive oil can be manufactured by cooking foxes and hyenas, some alive and some dead, whole in oil.[772] Galen discusses with perfect seriousness the relative strength of various animal fats, those of the goose, hen, hyena, goat, pig, and so forth.[773] He decides that lion’s fat is by far the most potent, with that of the pard next. Among his simples are also found the slough of a snake, a sheepskin, the lichens of horses, a spider’s web,[774] and burnt young swallows, for whose introduction into medicine he gives Asclepiades credit.[775] Of Archigenes’ prescriptions for toothache he repeats that which recommended holding for some time in the mouth a frog boiled in water and vinegar, or a dog’s tooth, burnt, pulverized, and boiled in vinegar.[776] Cavities may be filled with toasted earthworms or spiders’ eggs diluted with unguent of nard. Teething infants are benefited, if their gums are moistened with dog’s milk or anointed with hare’s brains.[777] For colic he recommends dried cicadas with three, five, or seven grains of pepper.[778] [Sidenote: Some scepticism.] Galen is less confident as to the efficacy for earache of the multipedes which roll themselves up into a ball, and which, cooked in oil, are employed especially by rural doctors.[779] He is still more sceptical whether the liver of a mad dog will cure its bite.[780] Many say so, and he knows of some who have tried it and survived, but they took other remedies too.[781] Galen has heard that some who trusted to it alone died. In one treatise[782] Galen discusses the strange virtues of the basilisk in much the usual way, but in his work on simples[783] he remarks drily that it is obviously impossible to employ it in pharmacy, since, if the tales about it be true, men cannot see it and live or even approach it without danger. He therefore will not include it or elephants or Nile horses (hippopotamuses?) or any other animals of which he has had no personal experience. [Sidenote: Doctrine of occult virtue.]