the Rosie Cross, the event being announced to him by the homage of three demons, Leviathan, Cerberus, and Belphegor (p. 214). In 1655 he published his _Euphrates_, and in 1656 made his head-quarters at Amsterdam or Eirenaeopolis. In 1659 came his _Fraternity of R. C._; in 1664 his _Medulla Alchymiae_.[30] In 1666 he exhibited the philosopher's stone to Helvetius at La Haye and converted him to occultism: in 1667 he at last resolved to publish his Opus Magnum, the _Introitus Apertus_, already written in 1645 (p. 215). In 1668 this was followed by the _Experimenta de Praeparatione Mercurii Sophici_ and the _Tractatus Tres_ (p. 236). The time was now approaching when Vaughan, in fulfilment of the pact of 1644, must disappear from earth. He named Charles Blount as his successor (p. 237), and was granted a magical vision of his grandson, the child of Diana Wulisso-Waghan and a Lenni-Lennap (p. 239). He finished his _Memoirs_, published the _Ripley Revised_[31] and the _Enarratio Methodica trium Gebri Medicinarum_, left his poems to his brother Henry, who published them in the next year as the _Thalia Rediviva_,[32] and on March 25, 1678, disappeared in the company of _Lucifer Dieu-Bon_ himself (p. 240). This event is vouched for, not only by a written statement of Henry Vaughan (p. 114), but also by the existence in a masonic triangle at Valetta of a magical talisman into which, when properly evoked, the spirit of Philalethes enters and records his glorious end for the edification of the Luciferians present[33] (p. 243).