Clearness then is one of the principal points of merit which the composer should have in view; if the effect, resulting from the choice and disposition of the ground-work of his drama, does honor to his inventiveness or taste; the justness, with which every character is to be performed, is not less essential to the success of his production, when carried into execution. To be well assured of this, it cannot but be necessary that the composer of the dance or ballet-master, should be himself a good performer, or at least understand the grounds of his art. He must also, in his composition, be pre-assured of all the necessaries for their complete execution. Otherwise decorations either deficient or not well adapted; an insufficient number of performers, or their being bad ones; or, in short, the fault of a manager, who, through a misplaced economy, would not allow the requisite expences; all these, or any of these, might ruin the composition, and the composer might, after taking all imaginable pains to please, find his labor abortive, and himself condemned for what he could not help. There is no exhibiting with success any entertainment of this sort without having all the necessary performers and accompaniments. It will be in a great measure perfect or imperfect in proportion as they are supplied or withheld. A good ballet-master must especially have regard to both poetical and picturesque invention; his aim being to unite both those arts under one exhibition. The poetical part of the composition being necessary to furnish a well-composed piece that shall begin with a clear exposition, and proceed unfolding itself to the conclusion, in situations well chosen, and well expressed. The picturesque part is also highly essential for the formation of the steps, attitudes, gestures, looks, grouping the performers, and planning their evolutions; all for the greatest and justest effect. He should himself be thoroughly struck with his initial idea, which will lead him to the second, and so on methodically until the whole is concluded, without having recourse to a method justly exploded by the best masters, that of choregraphy or noting dances, which only serves to obstruct and infrigidate the fire of composition. When he shall have finished his composition, he may then coolly review it, and make what disposition and arrangement of the parts shall appear the best to him. Every interruption is to be avoided, in those moments, when the imagination is at its highest pitch of inventing and projecting. There are few artists who have not, at times, experienced in themselves a more than ordinary disposition or aptitude, for this operation of the mind; and it is these critical moments, which may otherwise be irretrievable, they ought particularly to improve, with as little diversion from them as possible. They should pursue a thought, or a hint of a thought, from its first crudity to its utmost maturity.