For the illustrations of the body of the work itself, I have used any kind of engraving which seemed suited to the subjects--line and mezzotint, on steel, with mixed lithographs and woodcuts, at considerable loss of uniformity in the appearance of the volume, but, I hope, with advantage, in rendering the character of the architecture it describes. And both in the plates and the text I have aimed chiefly at clear intelligibility; that any one, however little versed in the subject, might be able to take up the book, and understand what it meant forthwith. I have utterly failed of my purpose, if I have not made all the essential parts of the essay intelligible to the least learned, and easy to the most desultory readers, who are likely to take interest in the matter at all. There are few passages which even require so much as an acquaintance with the elements of Euclid, and these may be missed, without harm to the sense of the rest, by every reader to whom they may appear mysterious; and the architectural terms necessarily employed (which are very few) are explained as they occur, or in a note; so that, though I may often be found trite or tedious, I trust that I shall not be obscure. I am especially anxious to rid this essay of ambiguity, because I want to gain the ear of all kinds of persons. Every man has, at some time of his life, personal interest in architecture. He has influence on the design of some public building; or he has to buy, or build, or alter his own house. It signifies less whether the knowledge of other arts be general or not; men may live without buying pictures or statues: but, in architecture, all must in some way commit themselves; they _must_ do mischief, and waste their money, if they do not know how to turn it to account. Churches, and shops, and warehouses, and cottages, and small row, and place, and terrace houses, must be built, and lived in, however joyless or inconvenient. And it is assuredly intended that all of us should have knowledge, and act upon our knowledge, in matters with which we are daily concerned, and not to be left to the caprice of architects or mercy of contractors. There is not, indeed, anything in the following essay bearing on the special forms and needs of modern buildings; but the principles it inculcates are universal; and they are illustrated from the remains of a city which should surely be interesting to the men of London, as affording the richest existing examples of architecture raised by a mercantile community, for civil uses, and domestic magnificence. DENMARK HILL, _February_, 1851. CONTENTS. PAGE Preface, iii CHAPTER I. The Quarry, 1 CHAPTER II. The Virtues of Architecture, 36