Columbia subject headings:
Police--Germany--Prussia--History.
Political persecution--Germany--Prussia--History.
Prussia (Germany)--Politics and government.
Harvard subject headings:
Police--Germany--Prussia--History--19th century.
Political crimes and offenses--Investigation--Germany--Prussia--History--19th century.
Political persecution--Germany--Prussia--History--19th century.
Prussia (Germany)--Politics and government--1806-1848.
Princeton subject headings:
Criminal procedure--Germany--Prussia--History.
Denunciation (Criminal law)--Germany--Prussia--History.
Law--Germany--History.
Pre-trial procedure--Germany--Prussia--History.