Proof: Beethoven’s Metronome Marks
These two pages from Beethoven’s Conversation Books show the interaction between Beethoven and his nephew Karl on 27 September 1826. All the metronome marks are listed correctly. Beethoven began alone for the first two movements. The writing after that is by Karl, who was called upon to assist with the remaining movements. The difference in their writing from the fourth line on is clearly visible.