Source: https://www.gutenberg.org/files/40690/40690-h/40690-h.htm

Walking Streetlamps for Hire in Seventeenth-Century London

Much in the same way we hail cabs in cities today, a medieval Londoner could hail a torch-bearer (a link-boy) to light their way home from a night on the town.
Blue and red flashing police lights

The Roots of Modern Police Work

The beginnings of modern police work have roots in the colonial experience in Ireland.