Broadly speaking, there are not five orders of architecture--nor
fifty--but only two: _Arranged_ and _Organic_. These correspond to the
two terms of that "inevitable duality" which bisects life. Talent and
genius, reason and intuition, bromide and sulphite are some of the
names we know them by.

Arranged architecture is reasoned and artificial; produced by talent,
governed by taste. Organic architecture, on the other hand, is the
product of some obscure inner necessity for self-expression which
is sub-conscious. It is as though Nature herself, through some human
organ of her activity, had addressed herself to the service of the
sons and daughters of men.

Arranged architecture in its finest manifestations is the product of
a pride, a knowledge, a competence, a confidence staggering to behold.
It seems to say of the works of Nature, "I'll show you a trick worth
two of that." For the subtlety of Nature's geometry, and for her
infinite variety and unexpectedness, Arranged architecture substitutes
a Euclidian system of straight lines and (for the most part) circular
curves, assembled and arranged according to a definite logic of
its own. It is created but not creative; it is imagined but not
imaginative. Organic architecture is both creative and imaginative. It
is non-Euclidian in the sense that it is higher-dimensional--that is,
it suggests extension in directions and into regions where the spirit
finds itself at home, but of which the senses give no report to the
brain.

[Illustration: PLATE VIII. IMAGINATIVE SKETCH BY HENRY P. KIRBY]

To make the whole thing clearer it may be said that Arranged and