Perhaps the most restless, care-worn faces in the city are to be seen on this street. Women clad in the richest attire pass you with unquiet face and wistful eyes, and men who are envied by their fellows for their "good luck," startle you by the stern, hard set look their features wear. The first find little real happiness in the riches they have sold themselves for, and the latter find that the costly pleasures they courted have been gained at too dear a price. [Picture: THE NEW RESIDENCE OF A. T. STEWART, ESQ.] Families are small in the Avenue, and Madame Restelle boasts, that her wealth has been earned in a large degree by keeping them so. Fashion has its requirements, and before them maternity must give way. Your fashionable lady has no time to give to children, but pets lap-dogs and parrots. Well, the Avenue mansions have their skeletons, as well as the east side tenement houses. The sin of the fashionable lady is covered up, however, and the poor girl must face the world. That is the difference. Madame married her husband for his money, and her love is given to one who has no right to claim it; and what between her loathing for her liege lord and her dread of detection, she leads a life not to be envied in spite of the luxury which surrounds her. The liege lord in his turn, never suspecting his wife, but disheartened by her coldness to him, seeks his "affinity" elsewhere; and, by and by, the divorce court tells some unpleasant truths about the Avenue. Contemplating these things, I have thought that the most wretched quarter of the city hardly holds more unhappy hearts than dwell along the three miles of this grand street; and I have thanked God that the Avenue does not fairly represent the better and higher phases of social and domestic life in the great city. XI. STREET TRAVEL. I. THE STREET CARS. The peculiar shape of the island of Manhattan allows the city to grow in one direction only. The pressure of business is steadily bringing the mercantile district higher up the island, and compelling the residence sections to go farther to the northward. Persons in passing from their homes to their business go down town in the morning, and in returning come up town in the evening. Those who live in the better quarters of the city, or in the upper portion of the island, cannot think of walking between their homes and their business. To say nothing of the loss of time they would incur, the fatigue of such a walk would unfit nine out of ten for the duties of the day. In consequence of this, street railways and omnibuses are more necessary, and better patronized in New York than in any city in the Union.