John R. Raynes, Engines and Men — Chapter XIX (1921)
“ Substitution was the phrase of the day, but it is impossible to substitute drivers and firemen on railway work. Young boys were then being employed with men long past the retiring age. "I sometimes find lads on our shunting engines who have a difficulty in making themselves seen," wrote Ivor Gregory. "Imagine lads who have to climb to look through the eye-glass, and have to stretch to look over the side-door on some of our engines, being jointly responsible with the driver for safe working!" ”
