 In October 1670 More was visited at Cambridge by Francis Mercury van Helmont (1614–1698), son of the famous iatrochemist, Jan Baptista van Helmont (1579–1644), and a student of Jewish Kabbalah. More asked van Helmont if he would visit Anne, Lady Conway, with a view to trying to treat the incessant debilitating headache which had troubled her for many years. As a result of meeting Anne, van Helmont became her resident physician, living at Ragley Hall in Warwickshire, where More himself was a frequent visitor. Van Helmont was a friend and collaborator of the leading Christian cabbalist of the day, Christian Knorr von Rosenroth (1631–1689), and More now had the opportunity to learn about the Jewish Kabbalah. It should be noted that although his own version of the cabbala, as published in his Conjectura Cabbalistica (1653), was nothing more than a method of scriptural interpretation of his own invention, More nevertheless felt that the original Jewish Kabbalah, deriving ultimately from Moses, was the true source of the philosophical theology which More had managed to “reconstruct”.