Trombone Duet Trombone - Level 2 - Digital Download SKU: A0.1235374 Composed by William Runyan. Arranged by Tyler Adams. Christian,Praise & Worship,Religious,Sacred. Score. 2 pages. Adams Arrangements #830907. Published by Adams Arrangements (A0.1235374). Great Is Thy Faithfulness warmly arranged as a duet for trombones.