Edwin A. Pratt,
A History of Inland Transport and Communication in England…
(1912)
“ In railway operation great importance must certainly be attached to the efficiency of the machinery, or of the system; but final success may depend to a very material extent on the efficiency of the unit. Everything that human foresight and railway experience can suggest may be done—both in the provision of complex machinery and in the drawing-up of the most perfect rules and regulations—to ensure safe working; yet the ultimate factor in grave issues on which safety or disaster will depend may be a worker who has either risen to, or has failed to meet, a sudden emergency. ”
