Inspector of the Dead by David Morrell

Inspector of the Dead - Morrell takes us back to the mid 19th century and continues relating life in London through the eyes of Thomas De Quincey; his daughter, Emily; and Detectives Ryan and Becker, the other characters we first encountered in Murder as a Fine Art.  In this case, a killer is murdering members of the British elite and leaving the name of a person who tried to kill Queen Victoria.