The Hollow Crown
"I have seen other augery"
Little is known about Tremayne. He was first encountered at the time of Failloeach when he tried to summon an army through a portal. At the point he was linked to Madeline Normand but it is unclear how strong this bond was.
He has a link to Gwendolyn Ashbridge and Prof. Michael Fallon. If Gwedolyn’s visions are correct they were bound together by Samuel Prescott at some time in Pre-roman Scotland. They have been reunited at least once before during Gwendolyn’s mortal life. They would appear to have some form of link to the Garou. ( Chapters Two – Three )
It would also seem that Tremayne was a leader within the garou, friend to both Fallon and Dr. John Mankiller before something caused him to break ranks with them and ally himself with the sabbat. ( The Land of the Setting Sun )