Twice they found the ruins of villages--a few vague hollows in the earth, where cellars had been, hollows in which huge trees were rooted, and where, perhaps, a grass-grown crumble of disintegrated brick indicated the one-time presence of a chimney. They discovered several farms, with a few stunted apple-trees, the distant descendants of orchard growths, struggling against the larger forest strength, and with perhaps a dismantled well-curb, a moss-covered fireplace or a few bits of iron that had possibly been a stove, for all relics of the other age. Mournful were the long stone walls, crumbling down yet still discernible in places--walls that had cost the labor of generations of farmers and yet now lay useless and forgotten in the universal ruin of the world. On the afternoon of the fifth day since having left their lean-to by the shore of Long Island Sound, they came upon a canyon which split the hills north of the site of Greenwich, a gigantic "fault" in the rocks, richly striated and stratified with rose and red and umber, a great cleft on the other side of which the forest lay somber and repellent in the slanting rays of the September sun. "By Jove, whatever it was that struck the earth," said Stern, "must have been good and plenty. The whole planet seems to be ripped up and broken and shattered. No wonder it knocked down New York and killed everybody and put an end to civilization. Why, there's ten cubic miles of material gouged out right here in sight; here's a regular Panama Canal, or bigger, all scooped out in one piece! What the devil could have happened?" There was no answer to the question. After an hour spent in studying the formations along the lip of the cleft they made a detour eastward to the shore, crossed the fjord that ran into the canyon, and again kept to the north. Soon after this they struck a railroad embankment, and this they followed now, both because it afforded easier travel than the shore, which now had grown rocky and broken, and also because it promised to guide them surely to the place they sought. It was on the sixth day of their exploration that they at last penetrated the ruins of Providence. Here, as in New York, pavements and streets and squares were all grassed over and covered with pines and elms and oaks, rooting among the stones and shattered brickwork that lay prone upon the earth. Only here or there a steel or concrete building still defied the ravages of time. "The wreckage is even more complete here than on Manhattan Island," Stern judged as he and the girl stood in front of the ruins of the post-office surveying the debris. "The smaller area, of course, would naturally be covered sooner with the inroads of the forest. I doubt whether there's enough left in the whole place to be of any real service to us." "To-morrow will be time enough to see," answered the girl. "It's too late now for any more work to-day."