Instrumental Duet Instrumental Duet,Organ,Violin - Level 4 - Digital Download SKU: A0.753491 Composed by Felix Alexandre Guilmant. Arranged by Christina Harmon. Wedding. Score and parts. 12 pages. Christina Harmon #6201011. Published by Christina Harmon (A0.753491). Offertoire sur le Noel: Nuit sombre, ton ombre vaut les plus beaux jours, (Dark night, your shadow is worth the most beautiful days). Scored for Violin and Organ.