Revered Spanish cellist and composer (1876–1973) widely regarded as the greatest player in the history of the instrument. Vintage ink signature, “Pablo Casals,” on a 8.25 x 10.75 sheet with three clipped magazine photos of Casals affixed to the sheet. Accompanied by the original mailing envelope addressed in Casals’ hand. Intersecting mailing folds, and some scattered light toning, otherwise fine condition. RRAuction COA.