IN describing the subject of the last sketch, our theme was the general aspect of the "Sala de los Embajadores." I have chosen to let this minute specimen of its detail follow the statement of its large dimensions, in order the more forcibly to convey an idea of its wonderful elaboration. The elegant morsel of stucco-work now presented to the student has been actually traced from a portion of the stucco-work of one of the window recesses immediately above the dado. It affords an admirable illustration of two principles constantly followed by the Moors in their treatment of decoration--viz., to preserve the continuity of all scroll work from root to fully developed foliation--a principle entirely disregarded in all previous ornamentation based upon classical practice--and to care first for larger surfaces to satisfy the eye with harmonious relations of those surfaces to one another, and to the spaces they have to enrich, from a distance; and then to provide minor fillings and intersections so as to supply adequate elaboration for close inspection. In addition to the decorative effect produced by variations in relief, still greater refinement was obtained by patterns in colour, painted upon the surfaces of the modelled ornaments. Although almost everywhere the colour has either been rubbed off, or rubbed into confusion, the abrasion has affected for the most part only the pigment and its albuminous vehicle, leaving the surface of the stucco bare, and showing the outline of the delicate ornament which has been drawn in by the pencil of the artist. It is on the nature of the stucco itself I think it may be well to offer here a few remarks. It certainly appears to be harder, closer in texture, tougher, and much less absorbent, than gypsum or plaster of Paris, when set in the usual manner. Lime alone, as ordinarily slacked, would not I believe give any such texture, even if it could be manipulated into similar ornamental forms. I believe the Moorish Stucco to be almost if not quite identical with the Indian "Chunam," and that in its turn to be a substance produced much in the same way that the fine Stucco of the Romans was ordinarily wrought by that people. In the native treatment of all of these substances, I believe four peculiarities to have been generally used. Firstly--to employ the finest lime only. Secondly--to mix it with pounded earthen-ware. Thirdly--to beat it thoroughly. Fourthly--to use saccharine substances to retard the setting and keep the mass plastic under the tool.