for SAATB unaccompanied. This glorious musical depiction of the honour, strength, power and authority of the Holy Trinity by Thomas Tallis is the third issue in the CMS's series of great English Responds from the 16th century, edited by Sally Dunkley. Scored for SAATB, it can be performed either as a motet or as a full Responsory with plainsong alternating with polyphony.