In 1537 Paré was made surgeon to the Colonel-General of Infantry, René de Montijean, with whom he made his first campaign in Italy. (This was in the army which King Francis I assembled in Provence with which to repulse the invasion of Charles V.) He had never seen war nor recent gunshot wounds, and only knew of them by what he had read in the writings of John de Vigo. This was at{125} a time when it was the custom of surgeons to pour boiling oil into every amputation or other wound in order to check haemorrhage; and Paré's experience in this, his first campaign, put him in the way of his first discovery,--a discovery which will never be forgotten. He has recounted in his _Book of Arquebus Wounds_ and in his great _Apology_ how after the affair of Pas-de-Suze he watched the other surgeons, dreaming of nothing else but to imitate them as far as he could; how the boiling oil gave out; how his anxiety about it prevented him from sleeping; and how to his great wonder he found that the wounded who had submitted to the operation suffered more than the others. This set him to thinking, and led him, a young man without name or authority, without letters or philosophical studies, to observe, to reason, and to combat a doctrine which was universally admitted and which the highest surgical authorities of the day sustained. At that time all authors who had spoken of gunshot wounds considered them as poisonous and complicated with burns; consequently they gave the precept to cauterize with boiling oil or a red-hot iron, and at the same time to administer certain alexipharmics which should serve as internal antidotes. John de Vigo, physician to Pope Julius II, assures us that the danger of these wounds results from the round formation of the balls, from heat, and from the poisonous qualities communicated to them by the powder. His theory and the method of treatment above given had been adopted without contradiction until the day when Paré dared to utter the first protest against them. After a campaign of three years, in which he lost his master, he returned to Paris and married. In 1543 he was in the army of Perpignan, in the service of de Rohan, grand lord of Brittany, where he gave continuous proof of his sagacity. It was after this campaign that his reputation, so well established among warriors and the nobility, inspired Sylvius with the desire of seeing him. Paré has recounted{126} how, in a conversation which they had together, he insisted upon the then entirely new precept, of which he had made many applications, that in order to extract bullets it was best to place the wounded in the position in which they were at the moment of injury. [Illustration: 0146]