for SATB double choir Phillipe de Monte wrote Super flumina Babylonis
(By the streams of Babylon, there we sat and wept) and sent it to William Byrd who responded by setting the subsequent verses of the psalm text Quomodo Cantabimus
(How shall we sing the Lord's song in a foreign land). This edition allows these wonderful pieces to be sung as a unit or separately.
The choice of pieces, however, is what makes this volume special . . . The two composers evidently made contact, as de Monte sent Byrd his setting of Psalm 137 vv1-4: (Jonathan Wikeley, Music Teacher, August 08