From the period we have last spoken of, until the commencement of the eleventh century, the only Alchemist of note is the Arabian Geber, who, though he wrote on the perfections of metals, of the new-found art of making gold, in a word, on the philosopher's stone, has only descended to our times as the founder of that jargon which passes under the name of "gibberish." He was, however, a great authority in the middle ages, and allusions to "Geber's cooks," and "Geber's kitchen," are frequent among those who at length saw the error of their ways, after wasting their substance in the vain search for the elixir.
A longer interval might have elapsed but for the voice of Peter the Hermit, whose fanatical scheme for the recovery of the Holy Sepulchre was the cause of that gradual absorption, by the nations of the West, of the learning which had so long been buried in the East. The crusaders, or those, rather, who visited the shores of Syria under their protection—the men whose skill in medicine and letters rendered them useful to the invading armies—acquired a knowledge of the Arabian languages, and of the sciences cultivated by Arabian philosophers, and this knowledge they disseminated through Europe. Some part of it, it is true, was derived from the Moors in Spain, but it was all conveyed in a common tongue which began now to be understood. To this era belong the names of Alfonso the Wise, King of Castile; of Isaac Beimiram, the son of Solomon the physician; of Hali Abbas, the scholar of Abimeher Moyses, the son of Sejar; of Aben Sina, better known as Avicenna, and sometimes called Abohali; of Averroes of Cordova, surnamed the Commentator; of Rasis, who is also called Almanzor and Albumasar; and of John of Damascus, whose name has been latinized into Johannes Damascenus. All these, physicians by profession, were more or less professors of alchemy; and besides these were such as Artephius, who wrote alchemical tracts about the year 1130, but who deserves rather to be remembered for the cool assertion which he makes in his "Wisdom of Secrets" that, at the time he wrote he had reached the patriarchal—or fabulous—age of one thousand and twenty-five years!
The thirteenth century came, and with it came two men who stand first, as they then stood alone, in literary and scientific knowledge. One was a German, the other an Englishman; the first was Albertus Magnus, the last Roger Bacon.
Of the former, many wonderful stories are told: such, for instance, as his having given a banquet to the king of the Romans, in the gardens of his cloister at Cologne, when he converted the intensity of winter into a season of summer, full of flowers and fruits, which disappeared when the banquet was over; and his having constructed a marvelous automaton, called "Androïs," which, like the invention of his contemporary, Roger Bacon, was said to be capable of auguring all questions, past, present, and to come.
To know more than the rest of the world in any respect, but particularly in natural philosophy, was a certain method by which to earn the name of a necromancer in the middle ages, and there are few whose occult fame has stood higher than that of Roger Bacon. He was afraid, therefore, to speak plainly—indeed, it was the custom of the early philosophers to couch their knowledge in what Bacon himself calls the "tricks of obscurity;" and in his celebrated "Epistola de Secretis," he adverts to the possibility of his being obliged to do the same thing, through "the greatness of the secrets which he shall handle." With regard to the invention of his greatest secret, we shall give the words in which he speaks of the properties of gunpowder, and afterward show in what terms he concealed his knowledge. "Noyses," he says, "may be made in the aire like thunders, yea, with greater horror than those that come of nature; for a little matter fitted to the quantity of a thimble, maketh a horrible noise and wonderful lightning. And this is done after sundry fashions, whereby any citie or armie may be destroyed." A more accurate description of the explosion of gunpowder could scarcely be given, and it is not to be supposed that Bacon simply confined himself to the theory of his art, when he knew so well the consequences arising from a practical application of it. On this head there is a legend extant, which has not, to our knowledge, been printed before, from which we may clearly see why he contented himself with the cabalistic form in which he conveyed his knowledge of what he deemed a fatal secret.
Attached to Roger Bacon's laboratory, and a zealous assistant in the manifold occupations with which the learned Franciscan occupied himself, was a youthful student, whose name is stated to have been Hubert de Dreux. He was a Norman, and many of the attributes of that people were conspicuous in his character. He was of a quick intelligence, and hasty courage, fertile in invention, and prompt in action, eloquent of discourse, and ready of hand; all excellent qualities, to which was superadded an insatiable curiosity. Docile to receive instruction, and apt to profit by it, Hubert became a great favorite with the philosopher, and to him Bacon expounded many of the secrets—or supposed secrets—of the art which he strove to, bring to perfection. He instructed him also in the composition of certain medicines, which Bacon himself believed might be the means of prolonging life, though not to the indefinite extent dreamed of by those who put their whole faith in the Great Elixir.
But there never yet was an adept in any art or science who freely communicated to his pupil the full amount of his own knowledge; something for experience to gather, or for ingenuity to discover, is always kept in reserve, and the instructions of Roger Bacon stopped short at one point. He was himself engaged in the prosecution of that chemical secret which he rightly judged to be a dangerous one, and, while he experimented with the compound of sulphur, saltpetre, and charcoal, he kept himself apart from his general laboratory, and wrought in a separate cell, to which not even Hubert had access. To know that the friar had a mysterious occupation, which, more than the making of gold or the universal medicine, engrossed him, was enough of itself to rouse the young man's curiosity; but when to this was added the fact, that, from time to time, strange and mysterious noises were heard, accompanied by bright corruscations and a new and singular odor, penetrating through the chinks close to which his eyes were stealthily riveted, Hubert's eagerness to know all that his master concealed had no limit. He resolved to discover the secret, even though he should perish in the attempt; he feared that there was good reason for the accusation of dealing in the Black Art, which, more than all others, the monks of Bacon's own convent countenanced, but this apprehension only stimulated him the more. For some time Hubert waited without an opportunity occurring for gratifying the secret longing of his heart; at last it presented itself.
To afford medical assistance to the sick, was, perhaps, the most useful practice of conventual life, and the monks had always among them practitioners of the healing art, more or less skillful. Of this number, Roger Bacon was the most eminent, not only in the monastery to which he belonged, but in all Oxford.
It was about the hour of noon on a gloomy day toward the end of November, in the year 1282, while the Friar and his pupil were severally employed, the former in his secret cell, and the latter in the general laboratory, that there arrived at the gate of the Franciscan convent a messenger on horseback, the bearer of news from Abingdon, that Walter de Losely, the sheriff of Berkshire, had that morning met with a serious accident by a hurt from a lance, and was then lying dangerously wounded at the hostelry of the Checkers in Abingdon, whither he had been hastily conveyed. The messenger added, that the leech who had been called in was most anxious for the assistance of the skillful Friar, Roger Bacon, and urgently prayed that he would lose no time in coming to the aid of the wounded knight.
Great excitement prevailed among the monks on the receipt of this intelligence, for Walter de Losely was not only a man of power and influence, but moreover, a great benefactor to their order. Friar Bacon was immediately sought and speedily made his appearance, the urgency of the message admitting of no delay. He hastily enjoined Hubert to continue the preparation of an amalgam which he was desirous of getting into a forward state, and taking with him his case of instruments with the bandages and salves which he thought needful, was soon mounted on an easy, ambling palfrey on his way toward Abingdon, the impatient messenger riding before him to announce his approach.