[Illustration: "SUCH WAS THE WORKSHOP IN WHICH THE TWO LABORED TOGETHER."]
"It was, as Arnold de Villeneuve had predicted, a long and toilsome labor which they had undertaken; it was, as the great Geber had said, a tremendous task to climb the steep mountain of knowledge and to pluck the mystic flower of wisdom from the top. But at last the summit was reached. Suddenly, one morning, unexpected success fell upon them like a flash of lightning; for this, like many other successes, happened through an accident-the overturning of a phial (the contents of which it had taken months to prepare) into a mortar in which Raymond was mixing a powder. It all happened in a moment-the accidental brushing of a sleeve-but that one moment was sufficient; the secret of life was discovered. From the secret of life to the secret of wealth was but a step; the one hung upon the other. The very next day they discovered that which shall make us-you, Oliver, and me, whom you may henceforth call 'master'-the richest men in France. Did you know that the diamond and the charcoal are the one and the same thing?"
"No," said Oliver, "I did not; the one is black and the other is white."
Oliver's companion laughed. "There is less difference between black and white, Oliver, and between the charcoal and the diamond, than most people think. Later you will learn that for yourself; just now you must take my word for it. But to resume our narrative. The next morning Raymond and his master, as I have said, produced from the first formula a second, by means of one drop of which they created in a closed crucible, in which five pounds of charcoal had been volatilized, a half-score of diamond crystals of various sizes, and one fine blue-white crystal of nearly eight carats in size. Oliver," cried the speaker, rising in his enthusiasm, and striding up and down the room, "that was, to my belief, the greatest discovery that the world ever saw! Other philosophers have approached the solution of the problem of life, and have prolonged their existence ten, twenty, yes, fifty years; still other philosophers have transmuted the baser metals into gold; but who ever heard of transmuting black charcoal into brilliant diamonds?" He stopped abruptly and turned towards the lad, and Oliver saw the eyes which looked into his blaze with excitement, like the diamonds of which he spoke. "Do you wonder," he cried, "that Raymond Lulli and his master acted like madmen when they opened that retort, and found those sparkling crystals twinkling like stars upon the rough surface of the metal? Ha!"