Autograph musical quotation of the first phrase of the Bourée from Bach's Cello Suite no. 3, from the legendary cellist largely responsible for reviving interest in Bach's cello suites. Casals has signed and dated below the music: "souvenir de / Pablo Casals / 1925." Two small ink blots to the music and a few other small smudges; overall very good. 5.25 x 6.5 inches (13.3 x 16.7 cm).