Do not imitate the works of a nation, Greek or Japanese, Italian or English; but their artistic spirit of design and their artistic attitude to-day, their own world, you should absorb but imitate never, copy never. Unless you can make as beautiful a design in painted china or embroidered screen or beaten brass out of your American turkey as the Japanese does out of his grey silver-winged stork, you will never do anything. Let the Greek carve his lions and the Goth his dragons: buffalo and wild deer are the animals for you. Golden rod and aster and rose and all the flowers that cover your valleys in the spring and your hills in the autumn: let them be the flowers for your art. Not merely has Nature given you the noblest motives for a new school of decoration, but to you above all other countries has she given the utensils to work in. You have quarries of marble richer than Pentelicus, more varied than Paros, but do not build a great white square house of marble and think that it is beautiful, or that you are using marble nobly. If you build in marble you must either carve it into joyous decoration, like the lives of dancing children that adorn the marble castles of the Loire, or fill it with beautiful sculpture, frieze and pediment, as the Greeks did, or inlay it with other coloured marbles as they did in Venice. Otherwise you had better build in simple red brick as your Puritan fathers, with no pretence and with some beauty. Do not treat your marble as if it was ordinary stone and build a house of mere blocks of it. For it is indeed a precious stone, this marble of yours, and only workmen of nobility of invention and delicacy of hand should be allowed to touch it at all, carving it into noble statues or into beautiful decoration, or inlaying it with other coloured marbles: for ‘the true colours of architecture are those of natural stone, and I would fain see them taken advantage of to the full. Every variety is here, from pale yellow to purple passing through orange, red, and brown, entirely at your command; nearly every kind of green and grey also is attainable, and with these and with pure white what harmony might you not achieve. Of stained and variegated stone the quantity is unlimited, the kinds innumerable. Were brighter colours required, let glass, and gold protected by glass, be used in mosaic, a kind of work as durable as the solid stone and incapable of losing its lustre by time. And let the painter’s work be reserved for the shadowed loggia and inner chamber.