L. van Beethoven: autograph sketches for String Quartet in C sharp minor, op. 131 (Add MS 38070, f. 51r) – Source.
Here, Beethoven – never a neat writer at the best of times – was sketching out ideas for his string quartet in one of the notebooks he carried around with him. He jotted down his ideas whenever he had an inspiration.
– See more at: http://publicdomainreview.org/collections/music-manuscripts-from-the-17th-and-18th-centuries-in-the-british-library/#sthash.ZsGQjz9X.dpuf