Autograph musical quotation from the Pulitzer Prize-winning American composer whose output spanned half a century. He has penned three measures from his Piano Sonata no. 3 on a trimmed sheet of manuscript paper, and has boldly signed at the foot and dated May 22, 1971. One folding crease; overall very fine. 7.75 x 7.25 inches (19.5 x 18.3 cm).