Choral Choir (SATB) - Level 4 - Digital Download SKU: A0.850863 Composed by Charles Marie Widor. Arranged by Andrew Henderson. Christian,Romantic Period,Sacred. Octavo. 50 pages. Andrew Henderson #3877407. Published by Andrew Henderson (A0.850863). Widor's imposing mass for two choirs, presented in a new and user-friendly edition. .