Instrumental Duet,Trombone,Trumpet - Level 2 - Digital Download SKU: A0.1141429 Composed by James R. Murray. Arranged by John Groves. Christmas,Holiday,Praise & Worship,Religious,Sacred. 3 pages. John Groves #741757. Published by John Groves (A0.1141429). Away In A Manger - arranged for Bb Trumpet & Trombone Duet.