Instrumental Duet Flute,Instrumental Duet,Organ - Level 4 - Digital Download SKU: A0.753486 Composed by Felix Alexandre Guilmant. Arranged by Christina Harmon. Wedding. Score and parts. 13 pages. Christina Harmon #6189533. Published by Christina Harmon (A0.753486). 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 Flute and Organ.