For 10 points, name this novel in which Gabriel Syme is voted the title character, written by G.K. Chesterton.
The protagonist of this novel claims that a disparaging comment about a redhead singing Wagner is insulting to his aunt in order to provoke a duel. A character in this novel is invited to an interview in a pitch black room, where he obtains a job despite his only qualification being his willingness to work. Its protagonist is surprised to be followed by the paralytic Professor de Worms. This book's first chapter is titled "The Two (*) Poets of Saffron Park." In this novel, the Marquis de St. Eustache is revealed to be an undercover policeman, and a terrorist organization is led by a council of seven leaders. It opens with Lucien Gregory trying to convince his friend to join an anarchist group. For 10 points, name this novel in which Gabriel Syme is voted the title character, written by G.K. Chesterton.
The protagonist of this novel claims that a disparaging comment about a redhead singing Wagner is insulting to his aunt in order to provoke a duel.
The Man Who Was Thursday