We are not to suppose that when a Painter sits down to deliberate on any work, he has all his knowledge to seek; he must not only be able to draw _extempore_ the human figure in every variety of action, but he must be acquainted likewise with the general principles of composition, and possess a habit of foreseeing, while he is composing, the effect of the masses of light and shadow that will attend such a disposition. His mind is entirely occupied by his attention to the whole. It is a subsequent consideration to determine the attitude and expression of individual figures. It is in this period of his work that I would recommend to every artist to look over his portfolio, or pocket-book, in which he has treasured up all the happy inventions, all the extraordinary and expressive attitudes, that he has met with in the course of his studies; not only for the sake of borrowing from those studies whatever may be applicable to his own work, but likewise on account of the great advantage he will receive by bringing the ideas of great Artists more distinctly before his mind, which will teach him to invent other figures in a similar style. Sir Francis Bacon speaks with approbation of the pro-visionary methods Demosthenes and Cicero employed to assist their invention; and illustrates their use by a quaint comparison after his manner. These particular _Studios_ being not immediately connected with our art, I need not cite the passage I allude to, and shall only observe that such preparation totally opposes the general received opinions that are floating in the world concerning genius and inspiration. The same great man in another place, speaking of his own essays, remarks, that they treat of "those things, wherein both men's lives and persons are most conversant, whereof a man shall find much in experience, but little in books:" they are then what an artist would naturally call invention; and yet we may suspect that even the genius of Bacon, great as it was, would never have been enabled to have made those observations, if his mind had not been trained and disciplined by reading the observations of others. Nor could he without such reading have known that those opinions were not to be found in other books. I know there are many Artists of great fame who appear never to have looked out of themselves, and who probably would think it derogatory to their character to be supposed to borrow from any other Painter. But when we recollect, and compare the works of such men with those who took to their assistance the inventions of others, we shall be convinced of the great advantage of this latter practice. The two men most eminent for readiness of invention, that occur to me, are Luca Giordano and La Fage; one in painting, and the other in drawing.