Complex sentence: Prior to 1839, the responsibility for policing in the City was divided, from the medieval period, between day and night City Watch, primarily under the two Sheriffs, responsibilities were shared with the Alderman's officers the Ward Beadles who are now a purely ceremonial.
Split into simpler sentences: Prior to 1839, the responsibility for policing in the City was divided, from the medieval period, between day and night City Watch, primarily under the two Sheriffs. Responsibilities were shared with the Alderman's officers the Ward Beadles who are now purely ceremonial.