And this is why we say that Stuart had genius. He followed no beaten track, he gave in his allegiance to no canons of the schools. His eagle eye pierced the secrets of nature according to no prescribed rules. Not satisfied with surfaces or accessories, he gave us character as well. Nor did he rest here. In the technical requirements of his art he stands original and alone. That seemingly hard, practical Scotch nature of his was yet attuned like a delicate chord to the melody of color. Few more than he have felt the subtle relation between sound and color--for he was also a musician. In the handling of pigments, again, he stands pre-eminent among the artists of his generation. Why is it that his colors are as brilliant, as pure, as forcible, as harmonious, to-day as when he laid them on the canvas nearly a century ago? If you carefully examine his pictures you shall see one cause of the result explained. He had such confidence in his powers, and such technical mastery, that he needed not to experiment with treacherous vehicles; and, rarely mixing tints on the palette, laid pure blues, reds, or yellows directly on the canvas, and slightly dragged them together. Thus he was able to render the stippled, mottled semblance of color as it actually appears on the skin; to suggest, also, the prismatic effect which all objects have in nature; and, at the same time, by keeping the colors apart, to insure their permanence. Stuart generally painted thinly, on large-grained canvas, which gave the picture the softness of atmosphere. But sometimes, as in the case of the powerful portrait of General Knox, he loaded his colors. But even in that work he did not depart from his usual practice in rendering the flesh tints. It has been alleged by some that Stuart was unable to do justice to the delicate beauty of woman, especially the refined type which is characteristic of the United States. He may have more often failed in this regard than in other efforts; but the force of the accusation disappears when one observes the extraordinary loveliness of such portraits as that of Mrs. Forrester, the sister of Judge Story, at Salem. But, indeed, it seemed to make little difference to him who the sitter happened to be. He entered into the nature of the individual, grasped the salient traits of his character, and, whether it was a seaman or a statesman, a triumphant general or a reigning belle, his unerring eye and his matchless brush rendered justice to them all.