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
It had become the Crime of the Century. Two months later, the body of the 20-month-old toddler was discovered a short distance from the Lindbergh’s' home town in New Jersey. The crime spurred Congress to pass the Federal Kidnapping Act, commonly called the "Lindbergh Law," which made transporting a kidnapping victim across state lines a federal crime.