With these two kinds of brick, the builder employed five or six kinds of marble: pure white, and white veined with purple; a brecciated marble of white and black; a brecciated marble of white and deep green; another, deep red, or nearly of the color of Egyptian porphyry; and a grey and black marble, in fine layers.
§ XX. The method of employing these materials will be understood at once by a reference to the opposite plate ([Plate III.]), which represents two portions of the lower band. I could not succeed in expressing the variation and chequering of color in marble, by real tints in the print; and have been content, therefore, to give them in line engraving. The different triangles are, altogether, of ten kinds:
a. Pure white marble with sculptured surface (as the third and fifth in the upper series of [Plate III.]).
b. Cast triangle of red brick with a sculptured round-headed piece of white marble inlaid (as the first and seventh of the upper series, [Plate III.]).
c. A plain triangle of greenish black marble, now perhaps considerably paler in color than when first employed (as the second and sixth of the upper series of [Plate III.]).
d. Cast red brick triangle, with a diamond inlaid of the above-mentioned black marble (as the fourth in the upper series of [Plate III.]).
e. Cast white brick, with an inlaid round-headed piece of marble, variegated with black and yellow, or white and violet (not seen in the plate).
f. Occurs only once, a green-veined marble, forming the upper part of the triangle, with a white piece below.
g. Occurs only once. A brecciated marble of intense black and pure white, the centre of the lower range in [Plate III.]
h. Sculptured white marble with a triangle of veined purple marble inserted (as the first, third, fifth, and seventh of the lower range in [Plate III.]).