Some years later, however, progress had led to emancipation. The art of engraving, henceforth free, broke from its industrial servitude, deserted the traditions of enamelling and chasing, and took possession of its own domain. There are still to be remarked, of course, a certain timidity and a certain lack of experience in the handling of the tool, an execution at once summary and strangely careful, a mixture of naïve intentions and conventional modes of expression. But the burin, though only able as yet imperfectly to treat lines in mass and vary the values of shadows, has mastered the secret of representing life with precision and elegance of outline, and can render the facial expression of the most different types. Sacred and mythological personages, sybils and prophets, madonnas and the gods of Olympus, the men and women of the fifteenth century, all not only reveal at the first glance their close pictorial relationship to the general inclinations and habits of Florentine art of the fourteenth century, but show us these tendencies continued and confirmed in a fresh form. The delicacy which charms us in the bas-reliefs and the pictures of the time; the aspiration, common to contemporary painters and sculptors, of idealising and heightening the expression of external facts; the love of rare, exquisite, and somewhat subtle expression, are to be found in the works left by the painter-engravers who were the immediate followers of Finiguerra, no less clearly than in the painted and sculptured subjects on the walls of contemporary churches and palaces. [Illustration: FIG. 21.--BACCIO BALDINI. Theseus and Ariadne.] Whatever we may suppose to have been the part due to Baccio Baldini, to Botticelli, to Pollajuolo, or to anybody else; with whatever acuteness we may discern, or think we discern, the inequalities of style and the tricks of touch in different men; all their works display a vigorous unity, which must be carefully taken into account, inasmuch as it gives its character to the school. Though we should even succeed in separately labelling with a proper name each one of the works which are all really dependent on one another, the gain would be small. [Illustration: FIG. 22.--BACCIO BALDINI. The Prophet Baruch.] Provided that neither the qualities nor the meaning of the whole movement be understood, we may, as regards the distribution of minor parts, resign ourselves to doubt, and even ignorance, and console ourselves for the mystery which enshrouds these nameless talents: and this the more readily that we can with greater impartiality appreciate their merits in the absence of biographical hypothesis and the commentaries of the scholar. [Illustration: FIG. 23.--BACCIO BALDINI. The Sibyl of Cumæ.]