Autograph manuscript of additions and corrections for the Piano Concerto in E-flat Major, Opus 73, containing passages and themes from all three movements, for the Breitkopf & Härtel edition. 3 p., folio (ca. 318 x 232 mm) on a single bifolium, 12 staves, notated in brown ink on up to twelve staves per page, with deletions and alterations, extensive annotations in the margins and dynamic markings, watermark: Kiesling, stitching holes, with a letter of authentication by Franz Lachner (dated Nov. 10, 1871), annotations to top margin in 2 other hands, no place or date [Vienna 1810 or 1811]