Soldier who led a wild and licentious life, part as a highwayman, until the death of his wife, after which he experienced a conversion. Did penance the rest of his life, first by caring for the sick in Jerusalem for seven years, then giving away his property, living as a hermit in a hollow tree near his own estate. Each week he travelled to Maastricht to venerate the relics of Saint Gervase, to Aachen to venerate Our Lady. Much slandered because of his early life and his austerities. Late in life he developed a dispute with some local monks who wanted him to join their monastery. Friend of, and corresondent with Saint Hildegard of Bingen. Had a vision of Saint Gervase on 5 January 1170.