Super Flumina Babylonis and Quomodo Cantabimus

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.