Boldly signed page from a 1954 concert of the great piano virtuoso with the London Philharmonic Orchestra under Sir Adrian Boult. Arrau has signed on the title page of the program, dated April 18, 1954. Together with another page from the same program, bearing halftone photographs of Arrau and Bolt on recto and verso. Left edge rough; some slight wrinkling but overall in fine condition. 5.5 x 8.75 inches (14.2 x 22.4 cm).