23. The quotation is ruined in “Kadenzen zu Klavierkonzerten,” ed. Joseph Schmidt-Görg, Beethoven: Werke, Abteilung VII, Band 7 (Munich-Duisburg: G. Henle, 1967), 47, where the first treble notes in the last quarter of m. 30 are given as a³ f³ (middle C = c¹). The autograph has it right, as does the old Gesamtausgabe.