large sum of money and jewels. In 1667 he was visiting Rudolf August of Brunswick and then Hamburg. Arrest and death Borri sought refuge in Copenhagen as an alchemist at Frederick III's court, which subsidised him liberally. In Denmark, Borri had many friends and helpers like Caspar Bartholin the Younger and was preceded by his solid reputation as a scientist. Meanwhile, other subsidies came from the former Queen Christina, then residing in Hamburg, interested in the mysteries of the Philosopher's Stone. Borri regained fame and honours, becoming a trusted councillor to the king. According to Michael White in Isaac Newton: The Last Sorcerer, Sir Isaac Newton attempted to contact Borri in 1669, through Newton's friend Francis Ashton. At the height of his fame, Borri's luxurious lifestyle left him penniless. In 1670, when Christian V ascended to the throne, Borri's fortunes again began to decline, and he resolved to leave Denmark and to move to Ottoman Empire. While journeying, he was arrested in Goldingen, Moravia or the Carpathian Mountains, and thanks to pontifical pressure, was given by Leopold I, Emperor of Austria, into the hands of the Vatican. Sentenced to life in prison on 25 September 1672, Borri, like his followers, was forced to perform a public act of abjuration and atonement. Borri stayed in jail until 1678. His noble friends (in particular the French ambassador, the Duke of Estrées, who was healed by Borri under a papal dispensation that permitted him to visit the sick nobleman in his mansion palazzo Farnese) obtained for him a sort of semi-liberty. In 1689 Christina of Sweden died, and the new Pope Innocent XII revoked the privileges granted to Borri. From 1691 Borri was under house arrest in Castel Sant'Angelo, where he furnished a laboratory to continue his studies, and was able go out to practise his art in the mansions of his noble friends, the prince Borghese and Borromeo. In this period he met again his old friends and despite captivity, he regained his reputation as a healer and thaumaturge in the Roman court. Having caught a malaria, the great physician had prescribed himself quinquina's bark, the most advanced cure then available. But the bark was not available in Rome, and arrived too late, and on 16 August 1695, Borri died at the age of 68. Works Lettere di F. B. ad un suo amico circa l’attione intitolata: La Virtù coronata. Roma 1643