Visiting the extremely curious and valuable gallery of this gentleman, the Hanoverian Minister at Rome, after making us begin at the beginning, among the very early masters, he led us on with courteous determination through his specimens of all the schools, and made us observe the characteristics of each school and each master, till at last we rested in the last room, where hung a single picture covered with a silken curtain. This at last, with sacred and reverent ceremony, was drawn aside, and revealed a portrait by Raphael,--the portrait of a lady, young and beautiful, and glowing with a tender sentiment which recalled to my remembrance these heads by Allston, not alone in the sentiment, but in the masterly beauty of the painting. M. Kestner told us he supposed the picture to be a portrait of that niece of Cardinal Bibbiena to whom Raphael was betrothed. The picture had come into his possession by one of those wonderful chances which have preserved so many valuable works from destruction. At a sale of pictures at Bologna, he told us he noticed a very ordinary head, badly enough painted, but with very beautiful hands,--hands which betrayed the work of a master; and he conjectured this to be some valuable picture, hastily covered with coarse work to deceive the emissaries of a conqueror when they came to select and carry off the most valuable pictures from the galleries of the conquered city. He gave his agent orders to purchase it, and when in his possession a little careful work removed the upper colors and discovered one of the most beautiful heads ever painted even by Raphael. Though it may and will seem extravagant, I am satisfied that there are several heads by Allston that would lose nothing by comparison with this admirable work. Indeed, though M. Kestner's picture is a portrait, it is a work so entirely in the same class with the "Beatrice," the "Rosalie," the "Valentine," and some other works of Allston, in sentiment and execution, that the comparison is fairly challenged. "Rosalie" is different from "Beatrice." She seems listening to music; and so the little poem written by the author, and recited by him when showing the picture newly finished to his friends, describes her. The face indicates, not a dream of sentiment, like that of "Beatrice," but rather a rapture. She is "caught on a higher strain." She is a creature as passionate as tender; more like Juliet than like Miranda; fit to be the love of a poet, and to reward his song with the overflowing cup of love. In this figure also beauty melts into feeling. The composition of color is masterly; in the draperies it is inlaid in opposing fields, by which means the key of the whole is raised, and the rising rapture of expression powerfully seconded. Did I not fear to insist too much on what may be only a private fancy, I should say that these colors reverberate like some rich orchestral strain of music.