- 
OJ 8/1, [7] Handwritten picture postcard from Heinrich Schenker to Moriz Violin, dated August 4,
    1911
 Schenker inquires after Violin's location and company; — reports his work on
    Riemann's theories. 
- 
OJ 14/45, [10] Handwritten letter from Moriz Violin to Heinrich Schenker, dated February 5,
    1918
 Schenker, Violin alleges, has accused him of a dearth of subject matter in letter
    writing; Violin defends himself on grounds that his life has been disrupted by military service
    and the impact of that on his physical and mental state. He accuses Schenker of insensitivity,
    and treating him like his pupils. He defends his wife for giving food to the Schenkers, and
    explains her motivation for so doing.  
- 
OJ 6/6, [6] Handwritten letter from Schenker to Moriz Violin, dated February 17, 1918
 Schenker warns Violin to expect a letter from Vrieslander concerning a
    contribution to a Festschrift for Schenker's 50th birthday, and then airs a number of grievances
    against Moriz and Valerie concerning jars of jam, Sunday visits, and insufficient food.  
- 
Sbb 55 Nachl. 13, [1] Handwritten letter from Schenker to Furtwängler, dated November 5, 1919
 Having attended for the first time a concert conducted by Furtwängler, Schenker
    congratulates him on his achievement then, proclaiming him a "counterweight" to the present [in
    his opinion inadequate] generation of conductors, and heir to the Mahler mantle. Schenker
    comments on Viennese concert-goers and their fickleness. — He commends Moriz Violin to
    Furtwängler, in case the latter can provide an introduction to Hausegger.  
- 
OJ 8/3, [91] Handwritten postcard from Heinrich and Jeanette Schenker to Moriz Violin, dated October
    16, 1920 
 Schenker is curious how Violin gets on with Ferdinand Pfohl. — Is Violin seeking
    a teaching position in Hamburg? — Reports on delivery of Kontrapunkt 2 to Cotta. — Will visit
    Wally next Sunday.  
- 
OJ 11/16, [3] Handwritten letter from Furtwängler to Schenker, dated November 26, 1920
 Furtwängler proposes that they meet on Tuesday [November 30, 1920].  
- 
OJ 6/7, [3] Handwritten letter from Schenker to Moriz Violin, dated May 6, 1922
 This wide-ranging letter describes the difficulties encountered with Emil Hertzka
    at Universal Edition, concerning an attack on the music critic Paul Bekker planned for the
    "Miscellanea" of Tonwille 2. — He expresses his displeasure with Weisse for putting his success
    as a composer in the way of aiding his teacher's cause, and for exploiting his teacher's
    generosity. — Ends with generous praise for Violin's musicianship.  
- 
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.  
- 
OJ 6/7, [8] Handwritten letter from Schenker to Moriz Violin, dated February 14, 1924
 Schenker reports continuing trouble with Hertzka, especially over delays to the
    publication of Tonwille 5 and 6, which were supposed to appear the previous year, and is
    beginning to think about legal action. Hertzka has made his position so difficult that he feels
    obliged to turn down Max Temming's offer of direct financial support for his work. He asks
    Violin to help find a post in Hamburg for Carl Bamberger, a gifted pupil who, though he
    neglected his piano studies for a while, is keen to make up for lost time. Finally, he asks if
    Violin received any of the four volumes of the Beethoven piano sonata edition.  
- 
OJ 6/7, [28] Handwritten letter from Schenker to Moriz Violin, dated March 1, 1926
 In a wide-ranging letter responding to Moriz Violin's previous letter,
        Schenker asks his friend to confide in him his personal troubles. He offers his support in
        the wake of the recent display of vanity of the cellist Friedrich Buxbaum. He is trying to
        find a way of getting the Hammer portrait to him safely, possibly by having it sent directly
        from Artaria's art shop. Finally he confirms the lack of musical giftedness of his new pupil
        Agnes Becker, recently arrived from Hamburg where Violin had been teaching
        her. 
- 
OJ 14/45, [52] Handwritten letter from Moriz Violin to Schenker, dated March 6, 1926
 Responding to Schenker's continuing queries, Violin gives some details of
        recent illnesses, the cure for which his doctor has ordered him to spend part of the summer
        in Bad Gastein. He is awaiting the arrival of the Hammer portrait, and is considering the
        future of his piano trio ensemble. 
- 
OC 38/341v Handwritten letter from Moriz and Fanny Violin to Schenker, dated December 24,
        1932
 Violin asks Schenker’s opinion about a reply to a letter he sent to Joseph
        Marx, who had been in Constantinople (Istanbul) for the purpose of regenerating a music
        conservatory there; he encloses a copy of Marx’s reply, which mentions Schenker in
        particular. 
- 
OJ 6/8, [16] Handwritten letter from Schenker to Violin, dated December 29, 1932
 Schenker advises Violin to keep up the pressure on Josef Marx regarding a
        possible position at the Vienna Akademie; he will do the same. He again discourages his
        friend from approaching Anthony van Hoboken with an appeal for financial
        assistance. 
- 
OC 18/43 Typewritten letter from Karpath to Schenker, dated December 31, 1932
 Karpath answers Schenker's accusations against Joseph Marx among others, in a
        placatory manner. — He encourages Schenker to ask Furtwängler for the awaited letter. — He
        will contact Marx and Franz Schmidt.