It seems all wrong to be pulling down those thick walls; exposing the privacy of the inside of the house, its arrangement of rooms and fireplaces, and the occupant's taste in color and wall decorations. Two young women who take the walk up-town always look the other way when they pass this sad display; they say it's unfair to take advantage of the house. Soon there will be a deep pit there with puffing derricks, the sidewalk closed, and show-bills boldly screaming. And by the time we have returned from the next sojourn out of town there will be an office-building of ever-so-many stories or another great hotel. Already the sign there will tell about it. You quicken your pace as you draw near the Park; some of the up-town walkers who live along here have already reached the end of their journey and are running up the steps taking out door-keys. The little boy in knickerbockers who seems responsible for lighting Fifth Avenue has already begun his zigzag trip along the street; soon the long double rows of lights will seem to meet in perspective. A few belated children are being hurried home by their maids from dancing-school; their white frocks sticking out beneath their coats gleam in the half light. Cabs and carriages with diners in them go spinning by, the coachmen whip up to pass ahead of you at the street-crossing; you catch a gleam of men's shirt-bosoms within and the light fluffiness of women, with the perfume of gloves. Fewer people are left on the sidewalks now--those that are look at their watches. The sun is well set by the time you reach the Plaza, but down Fifty-ninth Street you can see long bars of after-glow across the Hudson. In the half-dark, under the Park trees, comes a group of Italian laborers; their hob-nailed shoes clatter on the cement-walk, their blue blouses and red neckerchiefs stand out against the almost black of the trees; they, too, are walking home for the night. The Walk Up-town is finished and the show is over for to-day. THE CROSS STREETS [Illustration: Down near the eastern end of the street.] THE CROSS STREETS A city should be laid out like a golf links; except for an occasional compromise in the interest of art or expediency it should be allowed to follow the natural topography of the country.