French Horn Duet Horn - Level 4 - Digital Download SKU: A0.1495681 By Richard St. Clair. By Richard St. Clair. Arranged by Richard St. Clair. 21st Century,Chamber,Christian,Contemporary,Praise & Worship. Score. 2 pages. Richard St. Clair #1072208. Published by Richard St. Clair (A0.1495681). Using a paraphrase of Martin Luther's famous hymn, A Mighty Fortress Is Our God, the first Horn leads with a solo fanfare, then the second horn joins in for a rollicking duet ending in brilliant fashion. Suitable for religious as well as secular occasions.