Washington, Library of Congress

Beethoven MSS = Nos. 37-61, of which many are letters;

Music MSS

41.	Op. 131	Quartet		sketches
42.	Op. 109	Piano Sonata		MS corrections
43.		Lied aus der ferne	1809	sketches
58.	Op. 130	Quartet, Presto		autograph
59.	Op. 50	Romanze for Violin and Orchestra		Autograph
60.	Op. 106	Piano Sonata		sketches
61.	Op.109	Piano Sonata		sketches