night-watchman

Noun

night watchman (plural night watchmen)

1. (historical) Prior to police forces, a person appointed by a town or city to walk the streets at night and guard the burghers from felons and robbers.
2. A person who guards (usually at a building) at night.
   • We can hear the night watchman click his flashlight / Ask himself if it's him or them that's insane1966, Bob Dylan, “Visions of Johanna”, in Blonde on Blonde
3. A lower order batter to play the last overs in low light to save better batters for the next day's play.