Beethoven had not had time to write down the piano part of the Third Concerto before the concert—only the orchestral parts. So the solo music existed only in his head, to be fleshed out with improvisation en route. No one in those days publicly played from memory. Beethoven arrived onstage, took his bow, sat down at the piano, and placed a sheaf of music on the stand. Young conductor Ignaz von Seyfried, who had helped out through the marathon rehearsal, was the designated page-turner. When Beethoven opened the solo part, Seyfried discovered that the pages were largely full of empty measures,
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Beethoven didnt write the piano part for his Third concerto; page turner saw a near-empty score on piano and was terrified
