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 of colour revealed by the incisions; while, again, the means at disposal may be increased by varying the colours of the under-coat in accordance with the design.

Of the potter's sgraffito I have no experience, but it is my present purpose briefly and practically to examine the method, special aptitudes, and limitations of polychrome sgraffito as applied to the plasterer's craft.

First, then, as to method. Given the wall intended to be treated: granted the completion of the scheme of decoration, the cartoons having been executed in several colours and the outlines firmly pricked, and further, all things being ready for beginning work. Hack off any existing plaster from the wall: when bare, rake and sweep out the joints thoroughly: when clean, give the wall as much water as it will drink: lay the 162