Sergeant Sir Peter' is an action novel written by Edgar Wallace. The story opens with a man named Peter Dunn, walking into his grandfather's study in Berkeley Square. The old man scowled up at him from over his gold-rimmed pince-nez. This was in the year 1918, when the street lamps were painted black so that wandering German aeroplanes should not be quite sure whether they were over Berkeley Square, or Hyde Park, and when Marylebone Road was all lit up like Piccadilly to attract enemy bombs-happily, Marylebone did not know this.
