In short, when we view Canova in himself and in his works singly, isolated from the age that preceded, and separated from that which now follows his own, in concentrated energy and originality of mind, he may hardly compare with Donatello, still less with Buonarotti, perhaps not with our own Flaxman; but when we estimate his genius in the varied, yet uniform excellence of his labours, in the principles upon which these are conducted,--when we recollect the state of degradation in which he found, and the elevated condition in which he left art; and remember, too, that his own works and practice between these extremes, were marked by no false splendors of talent, but must prove a shining light, guiding to yet higher attainment; we must pronounce, in truth and gratitude, that none other name is in merit so inseparably associated with the progress of sculpture. Since the death of his illustrious contemporary, Thorwaldsen, born at Copenhagen, 1771-2, has occupied the public eye as head of the modern school. The character and powers of this master are doubtless of a very elevated rank; but neither in the extent nor excellence of his works, do we apprehend his station to be so high as sometimes placed. The genius of the Danish sculptor is forcible, yet is its energy derived more from peculiarity than from real excellence. His ideal springs less from imitation of the antique, or of nature, than from the workings of his own individual mind--it is the creation of a fancy seeking forcible effect in singular combinations, rather than in general principles; therefore hardly fitted to excite lasting or beneficial influence upon the age. Simplicity and imposing expression seem to have hitherto formed the principal objects of his pursuit; but the distinction between the simple and rude, the powerful and the exaggerated, is not always observed in the labours of the Dane. His simplicity is sometimes without grace; the impressive--austere, and without due refinement. The air and contours of his heads, except, as in the Mercury--an excellent example both of the beauties and defects of the artist's style--when immediately derived from antiquity, though grand and vigorous, seldom harmonize in the principles of these efforts with the majestic regularity of general nature. The forms, again, are not unfrequently poor, without vigorous rendering of the parts, and destitute at times of their just roundness. These defects may in some measure have arisen from the early and more frequent practice of the artist in relievos. In this department, Thorwaldsen is unexceptionably to be admired. The Triumph of Alexander, originally intended for the frieze of the government palace at Milan, notwithstanding an occasional poverty in the materials of thought, is, as a whole, one of the grandest compositions in the world; while the delicacy of execution, and poetic feeling, in the two exquisite pieces of Night and Aurora, leave scarcely a wish here ungratified.