"is there a sleeper more inscrutable..."See in text(Book the First: Recalled to Life - Chapter III)
This is a rhetorical question, or a question that asserts the speaker’s point of view but does not require an answer. The narrator wonders whether one of the corpses in London’s many graveyards possesses secrets that would make him/her even more puzzling (and therefore “inscrutable” or unknowable) than the city’s living inhabitants.
