Instrumental Duet Instrumental Duet,Organ,Piano - Level 4 - Digital Download SKU: A0.809596 Composed by William Walter/Aaron Williams. Arranged by Marilyn Thompson. Christian,Gospel,Sacred. Score and parts. 13 pages. Marilyn Thompson #6339181. Published by Marilyn Thompson (A0.809596). A stirring call to the Church to face the challenges of today is reflected in this high-energy duet. The two hymn tunes of FESTAL SONG and ST THOMAS are superimposed in the Finale section of the piece.  A Duo Piano/Keyboard part is available on another post. (Please contact marilyn@mtmusicministries.com for further information.) ASCAP.