This section is from "The Horticulturist, And Journal Of Rural Art And Rural Taste", by P. Barry, A. J. Downing, J. Jay Smith, Peter B. Mead, F. W. Woodward, Henry T. Williams. Also available from Amazon: Horticulturist and Journal of Rural Art and Rural Taste.
The following description of a grotto at Goodwood, Eng., possesses interest: "Within an inclosure there is a shell grotto of architectural design and admirable workmanship; its length including an alcove or recess is fifteen feet six inches, its breadth is ten feet six inches, and the height to the top of the coved ceiling is nearly eleven feet The lines of its cdrnices and plinths, as well as those of the pilasters, arches, and niches, are of a purely Grecian character; the whole is covered with myriads of shells, of various colors and sizes, and all is arranged bo as to preserve intact not only the severe geometric lines, but also to form panels of coloring on the walls, from which vases, wreaths, and cornucopias of flowers project - exquisitely formed of the same beautiful material, conferring a certain degree of taste and finish on the whole apartment The niches are filled with mirrors, and the floor is composed of black and white marble with panelling of horses' teeth. The whole was executed previously to the year 1850 by the delicate bands of Sarah the second Duchess of Richmond and those of her two daughters, exhibiting a degree of patient skill and untiring industry altogether unequalled, and one sees with regret the inroads that the silent hand of Time has already worked on this unique and superbly finished structure".