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OJ 12/11, [1] Handwritten letter from Klenau to Schenker, dated September 17, 1923
First approach from Klenau: asks to visit Schenker.
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OC 82/10 Memorandum of a discussion of the Missa solemnis, dated September 21,
1923
Memorandum of a discussion of the Missa solemnis between Klenau and
Schenker.
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OJ 6/7, [7] Handwritten letter from Heinrich Schenker to Moriz Violin, dated October 21,
1923
In a wide-ranging letter, Schenker expresses his joy at Karl Violin’s improving
health, and goes on to mention a number of personal successes he has lately had, including a
visit from Paul von Klenau to take advice for a forthcoming performance of Beethoven’s Missa
solemnis. He has also had some unexpected support from his publisher, who wants to expand Der
Tonwille to a quarterly publication. He is planning to take part in a series of charity concerts
(three Haydn piano trios), and has heard that Clemens Kraus and Hans Knappertsbusch are
overtaking Furtwängler as conductors in Vienna by accepting more modest fees.
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OJ 12/11, [6] Handwritten letter from Klenau to Schenker, dated December 28, 1923
Klenau praises Schenker's monograph Beethovens Neunte Sinfonie; regrets being
unable to visit Schenker and Schenker's being unable to attend his performance of the Missa
solemnis.
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OJ 89/4, [1] Handwritten letter from Schenker to Hoboken, dated February 22, 1930
Schenker advises that an analysis of the score of Beethoven's Missa solemnis
should be taken at a slow pace.
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OJ 89/4, [2] Typewritten letter (carbon copy) from Hoboken to Schenker, dated March 19,
1930
Hoboken compares performances of Beethoven's Missa solemnis by Furtwängler and
Klemperer. — He has experienced pains in his arm, and has taken recuperative lessons from
Rudolf Breithaupt. — He details work he has been doing for the Photogramm Archive, work of
his own, and that for Schenker.