"Certainly it does," replied the doctor. "Did you never see a moving house before? You must have heard of them at any rate, for nothing can be more common. It certainly is convenient, when one wants to go into the country for a few weeks, to be able to take one's house with one: it saves a great deal of trouble in packing, and permits one to have all of one's little conveniences about one. You see that there are grooves in the bottom of the houses that just fit on the iron railways; and as they are propelled by steam, they slide on without much trouble. It does not answer, however, with any but small houses, for large ones can't well be made compact enough.