[Mendelssohn-Bartholdy, Felix. (1809–1847)] Berger, Carl Ludwig. (1777–1839) "Sonate à quatre mains" - Autograph ManuscriptAutograph manuscript of a sonata for four hands, believed to be his Opus 15, dated Frankfurt, May 1803. Cover, 24 folio pages, comprising the movements "Allegro moderato," "Adagio," and "Rondo: Allegro molto," each scored on opposite facing pages for use by the performers, entirely in Berger's hand in dark ink, including a number of cancellations and corrections. In very good condition, slight staining at upper right corner barely affecting the