How kind to indulge me. ❤️
Do we know that the nuns are Anglican rather than just not Roman Catholic? I don’t remember the Bishop or anyone else visiting, apart from them having random clergy lodging with them a couple of times, but it could just be my memory.
Anyway: psalms in Anglican services. There are 150 psalms. In cathedrals and churches where the psalms are sung at some point or points every day, each psalm is sung every month. I imagine the Nonatus nuns do similar. There’s a timetable for this, so if they are singing Psalm 39 it was probably the second Wednesday in the month (I have lost the reference which I found yesterday). There’s a different pattern in churches which don’t have a service every day. It’s also often sung at funerals.
As to the tune, there are lots of ‘chants’, which is a 4-part harmony set of 8 bars. This covers every 2 verses. For verses 3&4 you sing them again, and so on. Psalms are marked up (‘pointed’) showing you where to move from one note to the next. This way it doesn’t matter that the lines and the psalms are not all the same length. If a psalm is very long you might change chants/tune halfway through.
The Nonnatus nuns just sing the top harmony line - the tune - in unison.
In some places just the choir sings the psalms, in others the congregation does as well. Usually there’s a ‘play over’ first, where the organ plays the chant once. I’m not a very good sight reader, but as long as I have the notes and the pointed psalm in front of me I can sing the alto line. It’s not hard, but it does need practice if you’re not used to it.
There’s a good blog article about it here.
If you want to hear some examples, listen to Choral Evensong on BBC R3 at 3pm on Wednesdays and Sundays. (The names after the psalm numbers are the people who wrote the chants, to identity them.) Even if you don’t want to hear a whole service, just listen to the start of this Wednesday or Sunday’s broadcast as it will begin with ‘Bethlehem Down,’ a piece which I think is absolutely lovely. It has the same unaccompanied beauty as the Nonnatus psalms. It contrasts the birth of Jesus with his later life, and Mary gets mentioned a lot. 😀