But indeed, though I had asked what was this building we stood in presence of, nobody could know so well as I what it was. The mystery was how it had come to be there for in the midst of this splendid city of equals, where poverty was an unknown word, I found myself face to face with a typical nineteenth-century tenement house of the worst sort--one of the rookeries, in fact, that used to abound in the North End and other parts of the city. The environment was indeed in strong enough contrast with that of such buildings in my time, shut in as they generally were by a labyrinth of noisome alleys and dark, damp courtyards which were reeking reservoirs of foetid odors, kept in by lofty, light-excluding walls. This building stood by itself, in the midst of an open square, as if it had been a palace or other show place. But all the more, indeed, by this fine setting was the dismal squalor of the grimy structure emphasized. It seemed to exhale an atmosphere of gloom and chill which all the bright sunshine of the breezy September afternoon was unable to dominate. One would not have been surprised, even at noonday, to see ghosts at the black windows. There was an inscription over the door, and I went across the square to read it, Edith reluctantly following me. These words I read, above the central doorway: "THIS HABITATION OF CRUELTY IS PRESERVED AS A MEMENTO TO COMING GENERATIONS OF THE RULE OF THE RICH." "This is one of the ghost buildings," said Edith, "kept to scare the people with, so that they may never risk anything that looks like bringing back the old order of things by allowing any one on any plea to obtain an economic advantage over another. I think they had much better be torn down, for there is no more danger of the world's going back to the old order than there is of the globe reversing its rotation." A band of children, accompanied by a young woman, came across the square as we stood before the building, and filed into the doorway and up the black and narrow stairway. The faces of the little ones were very serious, and they spoke in whispers. "They are school children." said Edith. "We are all taken through this building, or some other like it, when we are in the schools, and the teacher explains what manner of things used to be done and endured there. I remember well when I was taken through this building as a child. It was long afterward before I quite recovered from the terrible impression I received. Really, I don't think it is a good idea to bring young children here, but it is a custom that became settled in the period after the Revolution, when the horror of the bondage they had escaped from was yet fresh in the minds of the people, and their great fear was that by some lack of vigilance the rule of the rich might be restored.