A knocker-up or knocker-upper had the job of rousing sleeping people so they could get to work on time. The role started during the Industrial Revolution, in Britain, the Netherlands, Ireland and some other countries, when alarm clocks were neither cheap nor reliable.
A knocker-up or knocker-upper had the job of rousing sleeping people so they could get to work on time. The role started during the Industrial Revolution, in Britain, the Netherlands, Ireland and some other countries, when alarm clocks were neither cheap nor reliable.
Source: Wikipedia "Knocker-up" · CC BY-SA 4.0
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