Antes de 1940, en Gran Bretaña existía una profesión llamada knocker ups, cuyo único propósito era despertar a la gente para que no llegaran tarde al trabajo.

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Before There Were Alarm Clocks, Knocker-Ups Were Paid to Wake Up Their Clients by Knocking!

A knocker-up, sometimes known as a knocker-upper were a profession in Britain and Ireland that started during and lasted well into the Indus...