OJ 10/3, [7] Handwritten letter from Otto Erich Deutsch Deutsch to Schenker, dated January 16, 1920

Deutsch will write to the Beethoven House in Bonn to seek permission to reproduce the manuscript of the "Moonlight" Sonata. He suggests using the first edition as the source for the missing opening and closing bars, and asks Schenker to refrain from polemics in his commentary. Copies of the manuscripts of Beethoven's piano sonatas Opp. 28, 109, 110 and 111 should not be difficult to obtain, and he has made inquiries regarding the manuscripts of Beethoven's Piano Sonata Op. 106 and Mozart's A minor Rondo K. 511.

OJ 10/3, [8] Handwritten postcard from Otto Erich Deutsch Deutsch to Schenker, dated February 12, 1920

The Beethoven House will only allow reproduction of the manuscript of the "Moonlight" Sonata in return for a royalty. Deutsch has offered 5% of the retail price.

OC 54/111 Typed letter from Otto Erich Deutsch to Schenker, dated January 8, 1927

Deutsch thanks Schenker for his recent communications, including a copy of the contract with Drei Masken Verlag for the Meisterwerk Yearbook, and asks for a copy of relevant extracts from the correspondence with the publishers. He reports progress in the establishment of a Photogram Archive at the Austrian National Library, with the cooperation of Dr Robert Haas and financial support from Anthony van Hoboken; similar plans to photographically reproduce autograph manuscripts are underway at the Beethoven House in Bonn, and (for manuscripts of Bach and Handel) also in England. He advises Schenker that proofs will start arriving from the printing-house Waldheim in a few weeks, and expresses his delight in being able to assist Schenker in the promotion of his work.

Diary entry by Schenker for 15 January 1920

Diary entry by Schenker for 19 January 1920