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.