The Parisian family, unless it be one of the bloated aristocrats and pampered children of luxury, do not occupy separate houses, as families do in American cities. Rents are somewhat too high to permit that luxury, and besides they never were used to it, and it wouldn't suit them at all. They have been accustomed to living up stairs for so many generations that I doubt if a genuine Parisian of the middle classes could be happy on or near the ground floor. The first floor, and, for that matter, the second and third, in the heart of the city, are devoted to business purposes. Above the third floors the residences begin, and they continue to the very top. As a rule, each floor constitutes a dwelling by itself, with halls, parlor or drawing-room, dining and sleeping rooms and kitchen, all compactly and very conveniently arranged. True, some of these apartments are small, not large enough to swing a cat in; but, as Mr. Dick Swiveler wisely observed, "You don't want to swing a cat, you know." The French housekeeper finds a kitchen five feet wide and six feet long quite large enough for the preparation of the food for the family, and the sleeping rooms, being only used for sleeping, may be very comfortable, if they are only large enough to hold a bed and the other necessary furniture. [Sidenote: HOW YOU GET INTO YOUR HOUSE.] The entrance to these buildings is on the ground floor, and is a wide gateway with a diminutive suite of apartments on one side, which is habited by the concierge, or, as the English call it, the porter. This personage, usually a woman, receives all messages from the different flats above her, answers all calls and gives all the information concerning the various families inhabiting it. It is she who cleans the main staircase which goes to the top of the house, and has charge of the buildings. At night, say at eleven, the great doors guarding this common entrance are shut, and whoever desires to enter thereafter finds a bell-pull, the other end of which is at the head of the concierge's bed. She doesn't bother herself to get up and see who it is, but she merely pulls a wire, the bolt of the great door is withdrawn, you enter, and shutting the door after you--it fastens with a spring lock--go to your floor, and enter your own house. Tibbitts likes this idea very much. He says that when you come home late at night, and not precisely in the condition to be accurate about things, there isn't any nonsense about finding a key first, and then going through the more delicate operations of finding a keyhole and getting the key in right side up. "All you have to do is to catch on that bell-pull, and the more unsteady you are, the better, for you lean back upon it, and your whole weight takes it." And he further remarked that there wasn't a concierge in Paris who wouldn't know his ring before he had been in the house a week.