"But," said I, "hee seemed to-day so peevish—so irritable."
"That," replied the professor, "is owing to a particular cause. But let us look at some fine pictures on the side altars, which by a lucky chance we obtained some time ago. There is only a single original—a Dominichino—among them, the rest are by unknown masters of the Italian school; but if you are free from prejudice, you will be forced to confess that every one of them might bear the most celebrated name."
I found it was exactly as the professor had said. Strangely enough, the only original was one of the weakest—if not the very, weakest of the collection, while the beauty of many of the anonymous pictures had for me an irresistible charm. The picture on one of the altars was covered up, and I asked the cause of this: "This picture," said the professor, "is the finest that we possess, it is the work of a young artist of modern times—certainly his last, for his flight is checked. At this time we are obliged, for certain reasons, to cover it up, but to-morrow, or the day after, I shall perhaps be in a condition to show it you."
I wished to make further inquiries, but the professor hurried swiftly through the passage, and that was enough to show his unwillingness to answer more. We went back to the college, and I readily accepted the invitation of the professor, who wished me, in the afternoon, to go with him to some public gardens in the neighbourhood. We returned home late, a storm had risen, and I had scarcely reached my dwelling than the rain began to pour down. About midnight the sky cleared up, and the thunder only murmured in the distance. Through the open windows the warm air, laden with scents, entered the room, and though I was weary I could not resist the temptation to take a walk. I succeeded in waking the surly man-servant, who had been snoring for about two hours; and in showing him that there was no madness in wall-dug at midnight. Soon I found myself in the street. When I passed the Jesuits' church, I was struck by the dazzling light that beamed through a window. The little side-door was ajar, so I entered and saw a wax-taper burning before a niche. When I had come nearer, I observed that before this niche a pack-thread net had been spread, behind which a dark form was running up and down the ladder, and seemed to be designing something on the niche. It was Berthold, who was accurately tracing the shadow of the net with black colour. On a tall easel, by the ladder, stood the drawing of an altar. I was much struck at the ingenious contrivance. If, gentle reader, you are in the least acquainted with the noble art of painting, you will once know, without further explanation, the use of the net, the shadow of which Berthold was sketching. Berthold was about to paint a projecting altar on the niche, and that he might make a large copy of the small drawing with due correctness, he was obliged to put a net, in the usual manner, over both the sketch and the surface on which the sketch
