The house is the sign of man's entering into possession of the earth. A houseless savage, living on wild game and accidental fruits, is an alien in nature, or a minor not yet come to his estate. As soon as he begins to cultivate the soil he builds him a house,--no longer a hut or a cave but the work of his own hands, and as permanent as his tenure of the cultivated field. If that is to descend to his children, the house must be so built as to endure accordingly. It is the material expression of the _status_ of the family,--such people in such a place. Hence the two-fold requirement of fitness for its use and of harmony with its surroundings. A log-house is the appropriate dwelling of the lumberer in the woods; but transplant it to a suburban lawn and it becomes an absurdity, and a double absurdity. It is not in harmony with the place, nor fit for the use of the citizen. Nothing more satisfactory in their place than the old English parish-churches; but transfer one of them from its natural atmosphere and surroundings to the midst of one of our raw villages or bustling cities, exposed to the sudden and violent changes of our climate,--the open timber roof admitting the heat and the cold, and the stone walls bedewed with condensed moisture,--and after the first pleasant impression of the moment is over, there is left only a painful feeling of mimicry, not to be removed by any precision of copying, nor by the feeble attempts at ivy in the corners. This is all evident enough, and in principle generally admitted; but we dodge the application of the principle, because we are not ready to admit to ourselves, what history, apart from any reasoning, would show us, that those importations are failures, and that not accidentally in these particular cases, leaving the hope of better success for the next trial, but necessarily, and because they are importations. All good architecture must be the gradual growth of its country and its age,--the accumulation of men's experience, adding and leaving out from generation to generation. The air of permanence and stability that we admire in it must be gained by a slow and solid growth. It is the product, not of any one man's skill, but of a nation's; and its type, accordingly, must be gradually formed. But in this, as in everything else, there must be an aim, and one persisted in, else no experience is gained. A mere succession of generations will do nothing, if for each of them the whole problem is changed. The man of to-day cannot profit by his father's experience in the building of his house, if his culture, his habits, his associates, are different from his father's,--much less if they have changed since his own youth, and are changing from year to year. He will not imitate, he will not forbear to alter. On such shifting sands no enduring structure is possible, but only a tent for the night.