to this simple and sagacious method of healing wounds, various curious applications were in high repute; more especially the oil of kittens, which the celebrated Pare discovered to his great delight, was prepared by boiling live cats, coat and all, in olive oil, and was until then a valuable secret preparation, called _oleum catellorum_, and its use, with that of other nostrums, was known under the name of _secret dressing_.[20] This simple mode of dressing wounds, especially those that were inflicted by fire-arms, was a great desideratum; for, up to this era in surgery, these injuries were healed by the application of scalding oil or red-hot instruments, under the impression that they were of a poisonous nature. Pare was one of the first army-surgeons who exploded this barbarous practice. Having, according to his own account, expended all his boiling oil, he employed a mixture of yolk of egg, oil, and turpentine, not without the apprehension of finding his patients labouring under all the effects of poison the following day; when, to his great surprise, he found them much more relieved than those to whom the actual cautery had been applied. In more recent times, armies have been unjustly accused of making use of poisonous balls; and this absurd charge was brought against the French after the battle of Fontenoy, when the hospital fever broke out among the wounded crowded in the neighbouring villages. Chewing bullets was also considered a means of imparting to them a venomous quality. Lead and iron, the metals of which these projectiles were usually cast, were also deemed of a poisonous nature. A sort of aristocratic feeling seemed to obtain in those days; and it is related that two Spanish gentlemen had procured gold balls to fire at Francis I. at the battle of Pavia, that so noble and generous a prince should not fall by the vile metal reserved for vulgar people; and, in the adverse ranks, La Chatarguene, a noble of the French court, had prepared bullets of the same costly material for the reception of Charles V. It was under the impression of this poisonous nature of wounds, that individuals of both sexes, called suckers, followed armies, and endeavoured to extract the venom by suction; the records of chivalry give us instances of lovely damsels who condescended to perform this operation with their lovely mouths upon their _damoiseaux_; and Sibille submitted the wounds of her husband, Duke Robert, to a similar treatment: indeed, these suckers were chiefly females. May not this practice be the origin of the term _leech_, applied in ancient times to medical men? Leechcraft was the art of healing. Thus Spenser: And then the learned leech His cunning hand 'gan to his wounds to lay, And all things else the which his art did teach.