Canon, Kurz ist der Schmerz, WoO 166 (mp3)
Canon written for the composer Louis Spohr.
[Michael Hamburger, Beethoven Letters, Journals and Conversations, (Thames and Hudson, 1984) p.133.]
Willem comments : "Yes, yes, you heard that right, the last note of bar 28 I changed from C to C#. You do have good ears, my dear girl! Why did I do that, you ask ? Well, to enliven the melody at that point somewhat, obviously. Harmonically it works perfectly alright, and it also fits in the general character of the piece, since Beethoven is using quite a lot of harmonic trickery throughout."
"May Beethoven strike you with lightning and thunderbolts !!"
"Why, thank you. And a good night to you too."