So Stockhausen gets this letter from Beethovenmain
The Brahms Institute of Lübeck reports an important find.
In a job lot of 20 boxes of musicalia bequeathed by a deceased music tracher, it has found an original letter by Beethoven. It is dated 1823 and mailed to Paris, addressed to a Herr Stockhausen.
As usual, Beethoven complains about his health and living conditions. He does not, sadly, offer analysis or criticism of Gruppen.