Life Before Alarm Clocks A knocker-up was a profession in England and Ireland that started during and lasted well into the Industrial Revolution and at least as late as the 1920s, before alarm clocks were affordable or reliable. A knocker-up's job was to rouse sleeping people so they could get to work on time.Life Before Alarm Clocks A knocker-up was a profession in England and Ireland that started during and lasted well into the Industrial Revolution and at least as late as the 1920s, before alarm clocks were affordable or reliable. A knocker-up's job was to rouse sleeping people so they could get to work on time.
Life Before Alarm Clocks A knocker-up was a profession in England and Ireland that started during and lasted well into the Industrial Revolution and at least as late as the 1920s, before alarm clocks were affordable or reliable. A knocker-up's job was to rouse sleeping people so they could get to work on time.