22. See Anton Felix Schindler, Beethoven as I Knew Him, ed. Donald W. MacArdle, tr. Constance S. Jolly (Chapel Hill and London: The University of North Carolina Press, 1966) 336–337; and Alexander Wheelock Thayer, Ludwig van Beethovens Leben, IV, ed. Hugo Riemann (Leipzig: Breitkopf & Härtel, 1907), 76.