Some of the most imposing and effective work of the architects is to be seen at Sion House, Isleworth. The great library displays all the resources of the school in the way of bold treatment with beautiful, elaborate work, garlands, Cupids, pilasters, embroidered in low relief. The chimney-pieces, ceilings, and all display this elegance and charming variety. It may be mentioned in proof of the elaborate study and pains devoted to their profession by these brothers, that in the Soane Museum all their minutely elaborate designs are to be seen. But would we have a really good idea of the brothers’ work, let us set out for Oxford Street, and pause in front of Stratford Place. Here we see a perfect architectural arrangement--the two terraces stretching down, the ends turning into Oxford Street, forming ornamental flanks, while the end is closed by a graceful classical mansion rising in the air with its pediment and pillars. The eye rests on it with comfort and satisfaction, and we admire the perfect ease and proportion of the lines. We turn and go our way, having gained a sense of general refinement. It should be recollected that the work of the brothers has not received fair treatment. Their idea was a combination of stone with yellow brick, and their two tints were intended to harmonize. In almost every instance the stone pilasters have been painted over, which gives a hard, artificial effect--the loftiness as well as the divisions of the stone are lost; the brickwork, too, has been coloured, and so the intention of the architects has been lost. In Mansfield Street, which lies westward of Portland Place, there is a broad, stately mansion, with spacious, lofty chambers, a goodly specimen of the nobleman’s house. It is worth looking at, for the attempt to “spiritualize” the stables by adorning them with Adam crescents and decorations. Horace Walpole noted in his copy of Pennant that this house was built on the model of a French Hôtel. Close to it are some highly elaborated bride-cake doorways in the best Adam style.