But at one spot when the journey was about half ended, not far from the great City of Zacatecas, they came to a road which could not be avoided. It was made up of short logs of wood laid parallel, and on these were fastened long, snaky iron rails. José, though more civilized than the others, had never seen anything of the kind before, but one of the other men who had made the journey before, explained by signs that an immense monster, dragging behind him houses full of people, ran at tremendous speed along the road, as a horse drew a cart along a dirt road. From the description José recognized it as a railroad, as he had heard about railroads when an open-eyed boy, from an itinerant peddler.