This is the "Kleine Sonate" for viola d'amore and piano.
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Sausle, liebe Myrthe
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Check the Petrucci Music Library at imslp.org
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I think it may be a John Dowland song I think it may be a John
Dowland song
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This Sonata is from Johannes Brahms and is an author
transcription for viola of the original for clarinet.
http://www.classical.net/music/recs/reviews/m/mer84190a.php