After sitting some time in the Cassino, the party paid for the refreshments they had taken, and departed. The young man was the last to leave the saloon, and I remarked him glancing behind him in the same way, just as he passed out at the door. I could not resist the impulse to rise and follow him; for I was at an age when a romantic feeling of curiosity is easily awakened. The party walked slowly down the Arcades, talking and laughing as they went. They crossed the Piazzetta, but paused in the middle of it to enjoy the scene. It was one of those moonlight nights so brilliant and clear in the pure atmosphere of Italy. The moon-beams streamed on the tall tower of St. Mark, and lighted up the magnificent front and swelling domes of the Cathedral. The party expressed their delight in animated terms. I kept my eye upon the young man. He alone seemed abstracted and self-occupied. I noticed the same singular, and, as it were, furtive glance over the shoulder that had attracted my attention in the Cassino. The party moved on, and I followed; they passed along the walks called the Broglio; turned the corner of the Ducal palace, and getting into a gondola, glided swiftly away. The countenance and conduct of this young man dwelt upon my mind. There was something in his appearance that interested me exceedingly. I met him a day or two after in a gallery of paintings. He was evidently a connoisseur, for he always singled out the most masterly productions, and the few remarks drawn from him by his companions showed an intimate acquaintance with the art. His own taste, however, ran on singular extremes. On Salvator Rosa in his most savage and solitary scenes; on Raphael, Titian, and Corregio in their softest delineations of female beauty. On these he would occasionally gaze with transient enthusiasm. But this seemed only a momentary forgetfulness. Still would recur that cautious glance behind, and always quickly withdrawn, as though something terrible had met his view.