 He is very protective of his 'art', and dislikes imitators of his style.At the beginning of "The Haunting of Alaizabel Cray", he has been killing women for 15 years, with 70-some victims.He may be a parody of Jack the Ripper, the pseudonym of a prolific but unidentified serial killer who committed a string of murders, mostly prostitutes, in London in the late 19th century.