But on the whole he appears to have been dissatisfied with his visit, and very little inclined to accede to Wolfgang's wish that he should take up his residence with them in Vienna.[14] His pleasure in his son's performance and admiration of his genius were as great as they had ever been. During the whole of his visit, one concert followed close on another, and Wolfgang was engaged almost as a matter of course for them all; his father took equal pride in his playing and his compositions. At one concert Wolfgang played the splendid concerto he had composed for Paradies (456 K.). "I had a very good box," writes his father to Marianne, "and could hear every gradation of the instruments so perfectly, that the tears came to my eyes for very joy"--so thoroughly did the old man appreciate and relish artistic beauty. The day after his father's arrival, Mozart invited Haydn to a quartet party at his house. On such occasions Mozart, who in later years discontinued his practice of the violin, usually took the tenor part. Kelly tells of a quartet party at Storace's, when Haydn took the first violin, Dittersdorf the second, Mozart tenor, and Van-hall violoncello--a cast unique of its kind.[15] L. Mozart writes to his daughter:-- They played three of the new quartets, those in B flat, A, and C major (458, 464,465 K.). They are perhaps a little easier than the other three, {L. MOZART'S VISIT TO VIENNA, 1785.} (321) but admirable compositions. Herr Haydn said to me: "_I assure you solemnly and as an honest man, that I consider your son to be the greatest composer of whom I have ever heard; he has taste, and possesses a thorough knowledge of composition._" L. Mozart knew the value of such an opinion from such a man; it afforded him a confirmation of his faith, and of the conviction to which he had sacrificed the best powers of his life. Such a testimony to his son's genius was the father's best reward, and one of the brightest spots of his life. L. Mozart obtained much credit also through his pupil Heinrich Marchand, who accompanied him, and played with great success at several concerts. Nor were other entertainments and enjoyments altogether wanting. He heard Aloysia Lange, whose beautiful voice had once been a source of anxiety to him, in Gluck's "Pilgrims of Mecca" and in Grétry's "Zemire and Azor" (her favourite part): "She sang and played admirably on both occasions." He visited the Baroness Waldstädten, whose acquaintance had gratified him so much, in the convent of Neuburg, where she was then staying; but we do not hear anything of the future course of their friendship.