duet was originally written for Alto Voice, Viola & Piano. It is
based on two Christmas texts, one an old German Christmas carol,
"Joseph Lieber, Joseph Mein", and the other a poem by Geibel.
This transcription works equally well as a horn & trombone duet, or for two horns or two trombones. (Alternate parts are provided) This edition is Published by International Opus
Stewart & Randy Gardner have recorded this piece for Dee's CD "D+"
Here is an excerpt: