I have seen many very fine shows of the kind in London, but certainly never anything that could at all be compared with this. Individual scenes--as, for instance, that of the masqued ball in "Gustavus"--may equal, by the effect of the first coup-d'oeil, any scene in "La Juive"; but it is the extraordinary propriety and perfection of all the accessaries which make this part of the performance worthy of a critical study from the beginning to the end of it. I remember reading in some history of Paris, that it was the fashion to be so _précieuse_ as to the correctness of the costumes of the French opera, that the manager could not venture to bring out "Les Trois Sultanes" without sending to Constantinople to obtain the dresses. A very considerable portion of the same spirit has evidently been at work to render the appearance of a large detachment of the court of Rome and the whole court of the Emperor Sigismund _comme il faut_ upon the scene. But, with all a woman's weakness at my heart in favour of velvet, satin, gold tissue, and ermine, I cannot but confess that these things, important as they are, appear but secondary aids in the magical scenic effects of "La Juive." The arrangement and management of the scenery were to me perfectly new. The coulisses have vanished, side scenes are no more,--and, what is more important still, these admirable mechanists have found the way of throwing across the stage those accidental masses of shadow by aid of which Nature produces her most brilliant effects; so that, instead of the aching eyes having to gaze upon a blaze of reflected light, relieved only by an occasional dip of the foot-lights and a sudden paling of gas in order to enact night, they are now enchanted and beguiled by exactly such a mixture of light and shade as an able painter would give to a picture. How this is effected, Heaven knows! There are, I am very sure, more things at present above, about, and underneath the opera stage, than are dreamed of in any philosophy, excepting that of a Parisian carpenter. In the first scene of the "Juive," a very noble-looking church rears its sombre front exactly in the centre of the stage, throwing as fine, rich, deep a shadow on one side of it as Notre Dame herself could do. In another scene, half the stage appears to be sunk below the level of the eye, and is totally lost sight of, a low parapet wall marking the boundary of the seeming river.