"A Knocker-Upper Was Someone Whose Purpose Was To Wake People Up During A Time When Alarm Clocks Were Expensive And Not Very Reliable. They Earned About Six Pence A Week Using A Pea Shooter To Shoot Dried Peas At The Windows Of Sleeping Workers In East London, 1930s. She Would Not Leave A Window Until She Was Sure That The Workers Had Woken Up"
"following"