Still less in volume, and still less intentional are the short but important observations on the principals of art and the epochs of style, scattered over nearly all the works of Cicero, but chiefly his Orator and Rhetoric Institutions. Some of his introductions to these books might furnish the classic scenery of Poussin with figures; and though he seems to have had little native taste for painting and sculpture, and even less than he had taste for poetry, he had a conception of nature; and, with his usual acumen, comparing the principles of one art with those of another, frequently scattered useful hints, or made pertinent observations. For many of these he might probably be indebted to Hortensius, with whom, though his rival in eloquence, he lived on terms of familiarity, and who was a man of declared taste and one of the first collectors of the time. Pausanias, the Cappadocian, was certainly no critic, and his credulity is at least equal to his curiosity; he is often little more than a nomenclator, and the indiscriminate chronicler of legitimate tradition and legendary trash; but the minute and scrupulous diligence with which he examined what fell under his own eye, amply makes up for what he may want of method or of judgment. His description of the pictures of Polygnotus at Delphi, and of the Jupiter of Phidias at Olympia, are perhaps superior to all that might have been given by men of more assuming powers, mines of information, and inestimable legacies to our arts. The Heroics of the elder, and the Eicones, or Picture Galleries of the elder and younger Philostratus, though perhaps not expressly written for the artist, and rather to amuse than to instruct, cannot be sufficiently consulted by the epic or dramatic artist. The Heroics furnish the standard of form and habits for the Grecian and Troic warriors, from Protesilaus to Paris and Euphorbus; and he who wishes to acquaint himself with the limits the ancients prescribed to invention, and the latitude they allowed to expression, will find no better guide than an attentive survey of the subjects displayed in their galleries. Such are the most prominent features of ancient criticism, and those which we wish the artist to be familiar with; the innumerable hints, maxims, anecdotes, descriptions, scattered over Lucian, Aelian, Athenæus, Achilles, Tatius, Tatian, Pollux, and many more, may be consulted to advantage by the man of taste and letters, and probably may be neglected without much loss by the student.