Auriol; or, The Elixir of Life

Auriol: or, The Elixir of Life is a novel by British historical novelist William Harrison Ainsworth. It was first published in 1844 in serial form, under the title Revelations of London. Auriol, written 1844, is slightly unusual in the Ainsworth repertoire as the action is entirely couched as a fantasy, so that the supernatural element (which occurs also, for instance, in his Guy Fawkes and his Windsor Castle) can take comparatively free rein. The story is accordingly a thoroughly gothic romance. (wiki)