Thayer-Forbes (p. 956) describes a meeting on 3 August 1825 between Beethoven and Otto de Boer, who gives him an account of music in his home city of Amsterdam (where he was a member of the Academy of Fine Arts) and Beethoven gives him a Canon for Two Violins (WoO 35).
However, an article by Jos van der Zanden, “A Dutch Visitor to Beethoven” (The Beethoven Journal, Vol. 14 No. 2, Winter 1999) reveals that the visitor to Baden was rather a Samson Moses de Boer. He was not an artist, but he was an amateur cellist. He provided Beethoven with some news about music in Holland, and particularly opera.
The article includes a reproduction of the autograph of the little canon that Beethoven wrote (the original is at Harvard), and concludes that it was probably intended for two cellos.
#Beethoven250 Day 347
Canon in A Major for Two Instruments (WoO 35), 1825
A studio recording played on violins with animated score.