Though designs for alarm clocks date back to the ancient Greeks, they were still not particularly widespread well after the Industrial Revolution. In Britain and Ireland, a large number of enterprising early birds made a living waking people for work.
A knocker-up would be paid a few pence a week to make the rounds and rouse workers, banging on their doors with a short stick or rapping on upper windows with a long pole. The knocker-up would not move on until he received confirmation that his drowsy client was up and moving.
Read More