But before this time, somewhere about the middle of the fifteenth century, the fashion of painting pictures upon panel for private purposes, though as yet religious subjects were principally chosen for treatment, had already begun; and we find the masters of the early part of the sixteenth century represented with tolerable fulness at Manchester. English collectors have long had a passion for Raphael, and England is almost as rich in his works in oils as Italy herself. Italy, however, keeps his frescos; and may she long keep them! There are more than thirty works ascribed to Raphael hanging on the walls of the Exhibition. Many of them are of doubtful genuineness; many of them have been restored. It is impossible to trace in these pictures the progress of Raphael's manner, and to mark the development of his style; but even in these one may see something of the change from the simplicity and feeling of his early works, produced under the influence of religious sentiment, and the still clinging stiffness of traditional restraints, to the freedom and coldness of his later works, painted under the influence of success at a dissolute court, of flattery, of jealousy, and of indifference to the motives of religion. The Venetian masters of the sixteenth century fill a large portion of the sides of one of the great saloons of this aisle, covering it with a glow of deepest color. The opposite side is hung with many pictures by Rubens; and the contrast between the works of the mighty colorists of Venice and the famous colorist of Antwerp is not without curious interest and instruction. The Venice wall has the color of Venetian sunsets, the gold and crimson of its clouds, the solemn blue of the Cadore hills, the deep green of the lagoons, the brown and purple of the seaweeds, and the shadows of the city of decaying palaces. Here are such harmonies as Nature strikes in her great symphony of color. But on the other wall are the colors of the courts in which Rubens passed so many of his days,--the dyes of tapestry, the sheen of jewels and velvet, the glaring crimson and yellow of royal displays; while the harmonies that he strikes out with his rapid and powerful hand are like those of the music of some great military band.