OJ 13/37, 1 Handwritten letter from Ernst Rudorff to Schenker, dated January 23, 1908

Grunsky replies to Schenker's inquiry about a passage in Chopin's Ballade No. 2, and welcomes Schenker's advocacy of the Urtext principle.

OJ 11/54, [6] Handwritten letter from van Hoboken to Schenker, dated January 3, 1926

Van Hoboken sends New Year greetings; reports that he is to see in the Paris Conservatory Library the autograph manuscript of Beethoven's "Appassionata" Sonata, which Einstein has apparently already photographed; he will travel to Vienna on January 6 for lesson on January 9.

OJ 11/54, [12] Handwritten letter from van Hoboken to Schenker, dated January 28, 1927

Hoboken had to cancel his planned visit to John Petrie Dunn because of illness. — He reports on library visits in London and Paris, discusses manuscripts and conditions for photography, purchases. — He plans no further trips this season.

OJ 6/7, [34] Handwritten letter from Schenker to Moriz Violin, dated June 30, 1927

Schenker answers Violin's birthday greetings letter philosophically. He is able to work on the final version Der freie Satz at leisure and in good spirits. He reports on the establishment of an archive of photographic reproductions of autograph and gives an account of a visit from Violin's sister Fanny: in return for a picture of Karl Violin, he is enclosing two pictures of himself and one of Jeanette. Finally, he urges his friend to spend part of the summer in Galtür.

OC 44/21 Handwritten postcard from Jonas to Schenker, dated September 18, [1934]

Jonas is back in Berlin; reports on elucidatory editions, and seeks advice; — he refers to Klemperer and Furtwängler, — he has received letter from Landshoff; — forthcoming lectures in Vienna.