The collapse of the Puritan regime and the restoration of the Stuart monarchy under Charles II in 1660 meant an immediate change in the style of government. Charles' government immediate priority was restoring those institutions of state that the Puritans had destroyed and that included the Chapel Royal which had been a vital centre of English musical life. Cooke – Charles' first choirmaster had a difficult task because the tradition of training choirboys had been destroyed but he did have benefit of being able to ride a wave of pent-up creative energy. Blow was a chorister at at Newark Parish Church when Cooke conscripted him into Chapel Royal's choir thirteen years later Blow was appointed as as Master of the Children of the Chapel Royal a post he held for nearly thirty five years combining it with a very successful career as a composer.
His setting of verses 8-12 of psalm 85 is one two dozen symphony anthems that he composed for the Chapel Royal. It's a contemplative and quite intimate piece that uses short ritornellos that develop naturally from the vocal material rather than a main symphony. Blow chose to have the instruments accompany the voices instead of alternating with them and it is this innovation which accounts for the piece's pleasing richness and the seamlessness of its texture. Enjoy :-).