as a cake of very hard color, of which a certain portion is to be ground
down or cut off, to paint the walls with. Once understand this
thoroughly, and accept the condition that the body and availing strength
of the edifice are to be in brick, and that this under muscular power
of brickwork is to be clothed with the defence and the brightness of the
marble, as the body of an animal is protected and adorned by its scales
or its skin, and all the consequent fitnesses and laws of the structure
will be easily discernible: These I shall state in their natural order.

Sec. XXX. LAW I. _That the plinths and cornices used for binding the
armor are to be light and delicate._ A certain thickness, at least two or
three inches, must be required in the covering pieces (even when
composed of the strongest stone, and set on the least exposed parts), in
order to prevent the chance of fracture, and to allow for the wear of
time. And the weight of this armor must not be trusted to cement; the
pieces must not be merely glued to the rough brick surface, but
connected with the mass which they protect by binding cornices and
string courses; and with each other, so as to secure mutual support,
aided by the rivetings, but by no means dependent upon them. And, for
the full honesty and straight-forwardness of the work, it is necessary
that these string courses and binding plinths should not be of such
proportions as would fit them for taking any important part in the hard
work of the inner structure, or render them liable to be mistaken for
the great cornices and plinths already explained as essential parts of
the best solid building. They must be delicate, slight, and visibly
incapable of severer work than that assigned to them.

Sec. XXXI. LAW II. _Science of inner structure is to be abandoned._ As
the body of the structure is confessedly of inferior, and comparatively
incoherent materials, it would be absurd to attempt in it any expression
of the higher refinements of construction. It will be enough that by its
mass we are assured of its sufficiency and strength; and there is the
less reason for endeavoring to diminish the extent of its surface by
delicacy of adjustment, because on the breadth of that surface we are to
depend for the better display of the color, which is to be the chief
source of our pleasure in the building. The main body of the work,
therefore, will be composed of solid walls and massive piers; and
whatever expression of