Water clock was a possibility but uncommon. Early industrial age was a person that you paid to come bang on your shutters until you responded.
Most people just kept a circadian routine. Another trick is to simply drink as much water as you need so that you will wake up after a given amount of time.
The idea of time as a unit of measure that is critical for task completion is a rather new invention of current culture.
Water clock was a possibility but uncommon. Early industrial age was a person that you paid to come bang on your shutters until you responded.
Most people just kept a circadian routine. Another trick is to simply drink as much water as you need so that you will wake up after a given amount of time.
The idea of time as a unit of measure that is critical for task completion is a rather new invention of current culture.