himself with the utmost ease. In the most voluminous works no fact was too minute for his retention, and no study was so abstruse but that he could master it; but any advantages he might have derived from this facility were neutralised by his ungovernable passions and his love of turmoil and debauchery. He was involved in continual difficulty, as well with the heads of the college as with the police of Rome, and acquired so bad a character that years could not remove it. By the aid of his friends he established himself as a physician in Rome, and also obtained some situation in the pope's household. In one of his fits of studiousness he grew enamoured of alchymy, and determined to devote his energies to the discovery of the philosopher's stone. Of unfortunate propensities he had quite sufficient, besides this, to bring him to poverty. His pleasures were as expensive as his studies, and both were of a nature to destroy his health and ruin his fair fame. At the age of thirty-seven he found that he could not live by the practice of medicine, and began to look about for some other employment. He became, in 1653, private secretary to the Marquis di Mirogli, the minister of the Archduke of Innsprück at the court of Rome. He continued in this capacity for two years; leading, however, the same abandoned life as heretofore, frequenting the society of gamesters, debauchees, and loose women, involving himself in disgraceful street quarrels, and alienating the patrons who were desirous to befriend him.
All at once a sudden change was observed in his conduct. The abandoned rake put on the outward sedateness of a philosopher; the scoffing sinner proclaimed that he had forsaken his evil ways, and would live thenceforth a model of virtue. To his friends this reformation was as pleasing as it was unexpected; and Borri gave obscure hints that it had been brought about by some miraculous manifestation of a superior power. He pretended that he held converse with beneficent spirits; that the secrets of God and nature were revealed to him; and that he had obtained possession of the philosopher's stone. Like his predecessor, Jacob Böhmen, he mixed up religious questions with his philosophical jargon, and took measures for declaring himself the founder of a new sect. This, at Rome itself, and in the very palace of the pope, was a hazardous proceeding; and Borri just awoke to a sense of it in time to save himself from the dungeons of the Castle of St. Angelo. He fled to Innsprück, where he remained about a year, and then returned to his native city of Milan.
The reputation of his great sanctity had gone before him; and he found many persons ready to attach themselves to his fortunes. All who were desirous of entering into the new communion took an oath
