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.