Critical remarks are not always understood without examples: it may not be improper, therefore, to give instances where the rule itself, though generally received, is false, or where a narrow conception of it may lead the artists into great errors.
It is given as a rule by Fresnoy, That the principal figure of a subject must appear in the midst of the picture, under the principal light, to distinguish it from the rest. A painter who should think himself obliged secretly to follow this rule, would encumber himself with needless difficulties; he would be confined to great uniformity of composition, and be deprived of many beauties which are incompatible with its observance. The meaning of this rule extends, or ought to extend, no further than this:—That the principal figure should be immediately distinguished at the first glance of the eye; but there is no necessity that the principal light should fall on the principal figure, or that the principal figure should be in the middle of the picture. It is sufficient that it be distinguished by its place, or by the attention of other figures pointing it out to the spectator. So far is this rule from being indispensable, that it is very seldom practised; other considerations of greater consequence often standing in the way. Examples in opposition to this rule are found in the Cartoons, in Christ's Charge to Peter, the Preaching of St. Paul, and Elymas the Sorcerer, who is undoubtedly the principal object in that picture. In none of those compositions is the principal figure in the midst of the picture. In the very admirable composition of the Tent of Darius, by Le Brun, Alexander is not in the middle of the picture, nor does the principal light fall on him; but the attention of all the other figures immediately distinguishes him, and distinguishes him more properly; the greatest light falls on the daughter of Darius, who is in the middle of the picture, where it is more necessary the principal light should be placed.
It is very extraordinary that Felibien, who has given a very minute description of this picture, but indeed such a description as may be called rather panegyric than criticism, thinking it necessary (according to the precept of Fresnoy) that Alexander should possess the principal light, has accordingly given it to him; he might with equal truth have said that he was placed in the middle of the picture, as he seemed resolved to give this piece every kind of excellence which he conceived to be necessary to perfection. His generosity is here unluckily misapplied, as it would have destroyed, in a great measure, the beauty of the composition.
Another instance occurs to me, where equal liberty may be taken, in regard to the management of light. Though the general practice is, to make a large mass about the middle of the picture surrounded by shadow, the reverse may be practised, and the spirit of the rule may still be preserved. Examples of this principle reversed may be found very frequently in the works of the Venetian School. In the great composition of Paul Veronese, The Marriage at Cana, the figures are, for the most part, in half shadow; the great light is in the sky; and, indeed, the general effect of this picture, which is so striking, is no more than what we often see in landscapes, in small pictures of fairs and country feasts; but those principles of light and shadow, being transferred to a large scale, to a space containing near a hundred figures as large as life, and conducted to all appearance with as much facility, and with an attention as steadily fixed upon the whole together, as if it were a small picture immediately under the eye, the work justly excites our admiration; the difficulty being increased as the extent is enlarged.
The various modes of composition are infinite; sometimes it shall consist of one large group in the middle of the picture, and the smaller groups on each side; or a plain space in the middle, and the groups of figures ranked round this vacuity.
Whether this principal broad light be in the middle space of ground, as in The School of Athens; or in the sky, as in The Marriage at Cana, in The Andromeda, and in most of the pictures of Paul Veronese; or whether the light be on the groups; whatever mode of composition is adopted, every variety and license is allowable: this only is indisputably necessary, that to prevent the eye from being distracted and confused by a multiplicity of objects of equal magnitude, those objects, whether they consist of lights, shadows, or figures, must be disposed in large masses and groups properly varied and contrasted; that to a certain quantity of action a proportioned space of plain ground is required; that light is to be supported by sufficient shadow; and we may add, that a certain quantity of cold colours is necessary to give value and lustre to the warm colours: what those proportions are cannot be so well learnt by precept as by observation on pictures, and in this knowledge bad pictures will instruct as well as good. Our inquiry why pictures have a bad effect may be as advantageous as the inquiry why they have a good effect; each will corroborate the principles that are suggested by the other.
Though it is not my business to enter into the detail of our Art, yet I must take this opportunity of mentioning one of the means of producing that great effect which we observe in the works of the Venetian painters, as I think it is not generally known or observed. It ought, in my opinion, to be indispensably observed, that the masses of light in a picture be always of a warm mellow colour, yellow, red, or a yellowish-white; and that the blue, the grey, or the green colours be kept almost entirely out of these masses, and be used only to support and set off these warm colours; and for this purpose, a small portion of cold colours will be sufficient.
Let this conduct be reserved; let the light be cold, and the surrounding colours warm, as we often see in the works of the Roman and Florentine painters, and it will be out of the power of art, even in the hands of Rubens or Titian, to make a picture splendid and harmonious.
Le Brun and Carlo Maratti were two painters of great merit, and particularly what may be called Academical Merit, but were both deficient in this management of colours; the want of observing this rule is one of the causes of that heaviness of effect which is so observable in their works. The principal light in the Picture of Le Brun, which I just now mentioned, falls on Statira, who is dressed very injudiciously in a pale blue drapery: it is true, he has heightened this blue with gold, but that is not enough; the whole picture has a heavy air, and by no means answers the expectations raised by the print. Poussin often made a spot of blue drapery, when the general hue of the picture was inclinable to brown or yellow; which shows sufficiently that harmony of colouring was not a part of the art that had much engaged the attention of that great painter.
The conduct of Titian in the picture of Bacchus and Ariadne has been much celebrated, and justly, for the harmony of colouring. To Ariadne is given (say the critics) a red scarf, to relieve the figure from the sea, which is behind her. It is not for that reason alone, but for another of much greater consequence; for the sake of the general harmony and effect of the picture. The figure of Ariadne is separated from the great group, and is dressed in blue, which, added to the colour of the sea, makes that quantity of cold colour which Titian thought necessary for the support and brilliancy of the great group; which group is composed, with very little exception, entirely of mellow colours. But as the picture in this case would be divided into two distinct parts, one half cold, and the other warm, it was necessary to carry some of the mellow colours of the great group into the cold part of the picture, and a part of the cold into the great group; accordingly, Titian gave Ariadne a red scarf, and to one of the Bacchante a little blue drapery.