[Illustration:  THE BIRTH OF VENUS.
        Botticelli.]

He is before all things a poetical painter, blending the charm of story and sentiment, the medium of the art of poetry, with the charm of line and colour, the medium of abstract painting.  So he becomes the illustrator of Dante.  In a few rare examples of the edition of 1481, the blank spaces left at the beginning of every canto for the hand of the illuminator have been filled as far as the nineteenth canto of the Inferno, with impressions of engraved plates, seemingly by way of experiment, for in the copy in the Bodleian Library, one of the three impressions it contains has been printed upside down and much awry in the midst of the luxurious printed page.  Giotto, and the followers of Giotto, with their almost childish religious aim, had not learned to put that weight of meaning into outward things, light, colour, every-day gesture, which the poetry of the Divine Comedy involves, and before the Fifteenth Century Dante could hardly have found an illustrator.  Botticelli’s illustrations are crowded with incident, blending with a naive carelessness of pictorial propriety three phases of the same scene into one plate.  The grotesques, so often a stumbling-block to painters who forget that the words of a poet, which only feebly present an image to the mind, must be lowered in key when translated into form, make one regret that he has not rather chosen for illustration the more subdued imagery of the Purgatorio.  Yet in the scene of those who go down quick into hell there is an invention about the fire taking hold on the up-turned soles of the feet, which proves that the design is no mere translation of Dante’s words, but a true painter’s vision; while the scene of the Centaurs wins one at once, for, forgetful of the actual circumstances of their appearance, Botticelli has gone off with delight on the thought of the Centaurs themselves, bright small creatures of the woodland, with arch baby faces and mignon forms, drawing tiny bows.

Botticelli lived in a generation of naturalists, and he might have been a mere naturalist among them.  There are traces enough in his work of that alert sense of outward things which, in the pictures of that period, fills the lawns with delicate living creatures, and the hill-sides with pools of water, and the pools of water with flowering reeds.  But this was not enough for him; he is a visionary painter, and in his visionariness he resembles Dante.  Giotto, the tried companion of Dante, Masaccio, Ghirlandaio even, do but transcribe with more or less refining the outward image; they are dramatic, not visionary painters; they are almost impassive spectators of the action before them.  But the genius of which Botticelli is the type usurps the data before it as the exponents of ideas, moods, visions of its own; with this interest it plays fast and loose with those data, rejecting some and isolating others, and always combining them anew.  To him, as to Dante, the scene, the colour, the outward image or gesture, comes with all its incisive and importunate reality; but awakes in him, moreover, by some subtle structure of his own, a mood which it awakes in no one else, of which it is the double or repetition, and which it clothes, that all may share it, with sensuous circumstances.