Score of the "Spring Sonata", Op. 23, with a displeased note in the margin by Beethoven

Beethoven was annoyed that the copyist had incorrectly - and without permission - entered the indications for triplets (3) and triplet pairs (6) in the manuscript. The translation of his note is: 'NB. The copyist who inserted 3 and 6 here was a donkey'. Nationalbibliothek Prunksaal, Vienna.