From the publisher’s website:

‘A serene and gradually strengthening setting of this prayer for peace.  Over an arpeggiated organ accompaniment, a three part structure is built up piece by piece, each part repeating until all are present.  Altos enter first, singing the Latin words.  Sopranos bring in the English translation, and the men underpin and reinforce the upper voices in building up the warm three part texture at the end. The accompaniment can be played without much difficulty on the piano instead of the organ.’