the 18th of November, 1706:
“I have something to relate to you, my dear cousin, which will be interesting to you and your friends. The philosopher’s stone, which so many persons have looked upon as a chimera, is at last found. It is a man named Delisle, of the parish of Sylanez, and residing within a quarter of a league of me, that has discovered this great secret. He turns lead into gold, and iron into silver, by merely heating these metals red hot, and pouring upon them in that state some oil and powder he is possessed of; so that it would not be impossible for any man to make a million a day, if he had sufficient of this wondrous mixture. Some of the pale gold which he had made in this manner, he sent to the jewellers of Lyons, to have their opinion on its quality. He also sold twenty pounds weight of it to a merchant of Digne, named Taxis. All the jewellers say they never saw such fine gold in their lives. He makes nails, part gold, part iron, and part silver. He promised to give me one of them, in a long conversation which I had with him the other day, by order of the Bishop of Senés, who saw his operations with his own eyes, and detailed all the circumstances to me. “The Baron and Baroness de Rheinwald shewed me a lingot of gold made out of pewter before their eyes by M. Delisle. My brother-in-law Sauveur, who has wasted fifty years of his life in this great study, brought me the other day a nail which he had seen changed into gold by Delisle, and fully convinced me that all his previous experiments were founded on an erroneous principle. This excellent workman received, a short time ago, a very kind letter from the superintendent of the royal household, which I read. He offered to use all his influence with the ministers to prevent any attempts upon his liberty, which has twice been attacked by the agents of government. It is believed that the oil he makes use of, is gold or silver reduced to that state. He leaves it for a long time exposed to the rays of the sun. He told me that it generally took him six months to make all his preparations. I told him that, apparently, the king wanted to see him. He replied that he could not exercise his art in every place, as a certain climate and temperature were absolutely necessary to his success. The truth is, that this man appears to have no ambition. He only keeps two horses and two men-servants. Besides, he loves his liberty, has no politeness, and speaks very bad French; but his judgment seems to be solid. He was formerly no more than a blacksmith, but excelled in that trade without having been taught it. All the great lords and seigneurs from far and near come to visit him, and pay such court to him, that it seems more like idolatry than any thing else. Happy would France be if this man would discover his secret to the king, to whom the superintendent has already sent some lingots! But the happiness is too great to be hoped for; for I fear that the workman and his secret will expire together. There is no doubt that this discovery will make a great noise in the kingdom, unless the character of the man, which I have just depicted to you, prevent it. At all events, posterity will hear of him.”
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