The quartet quotes the following plainchant: Salvator mundi, Domine: qui nos salvasti hodie, in hac nocte nos protege et salva omni tempore. 'Saviour of the world, Lord, Who has saved us today, In this night protect us, And save at every time.' - Hymn at Compline on Christmas Day

Listen to a recording: https://soundcloud.com/ed-hughes-4/string-quartet-in-one-movement

Recorded by Susanne Stanzeleit (violin 1), Marina Gillam (violin 2), Gustav Clarkson (viola), Andrew Fuller (cello), in St Silas Church, Kentish Town, 25th July 2012