French Horn Duet Horn - Level 2 - Digital Download SKU: A0.1195253 By Traditional. By Traditional. Arranged by Bragi Thor Valsson. 19th Century,Praise & Worship,Religious,Sacred,Spiritual. Score. 5 pages. Bragi Thor Valsson #794435. Published by Bragi Thor Valsson (A0.1195253). An arrangement of the well-known Spiritual Nobody Knows The Trouble I've Seen for two F horns with piano accompaniment.