As to the decorations and machines especially, I know of no place where there is less excuse for their being deficient in them than in London, where they are too manifestly, to bear any suspicion of flattery in the attributing it to them, executed to a perfection that is not known in any other part of Europe. The quickness with which the shifts and deceptions in the pantomime entertainments are performed here, have been attempted in many other parts; but the persons there employed, not having the same skill and depth in mechanics as the artists here, cannot come up to them in this point. And it is in this point precisely that a composer of dances may be furnished with great assistence in the effects from the theatrical illusion. And in an entertainment, where by an established tacit agreement between the audience and performers, there is such a latitude of introducing superhuman personages, either of the heathen deities, or of fairy-hood, inchanters, and the like, those transformations and deceptions of the sight are even in the order of natural consequences, from the pre-supposed and allowed power of such characters to operate them. At the same time the rules of probability must even there be observed. Nor is it amiss to be very sparing and reserved in the composition of those dances, grounded on the introduction of purely imaginary beings, such as the allegorical impersonation of the moral Beings, whether the Virtues or the Vices. Unless the invention is very interesting indeed, the characters distinctly marked, and the application very just and obvious; their effect is rarely answerable to expectation, especially on the audiences of this country. The taste here for those airy ideal characters is not very high, and perhaps not the worse for not being so.