Samuel Smiles, Lives of the Engineers
“ The time is coming when it will be cheaper for a working man to travel upon a railway than to walk on foot. I know there are great and almost insurmountable difficulties to be encountered; but what I have said will come to pass as sure as you live. I only wish I may live to see the day, though that I can scarcely hope for, as I know how slow all human progress is, and with what difficulty I have been able to get the locomotive thus far adopted, notwithstanding my more than ten years’ successful experiment at Killingworth. ”
