What you see above is a video of Quire Cleveland performing a song called Sherburne, sung to music written by the 18th century American composer Daniel Read. This music first appeared in The American Songbook (New Haven, CT, 1785), a hymnal published and sold by Read himself.  In that publication, the song is shown with "Words by unknown."  However, according to some modern sources, the words first appeared in 1700 in a supplement to the New Version of the Psalms of David (1696), authored by Nahum Tate and Nicholas Brady and published in England. 
I first heard Sherburne sung by The Boston Camerata as part of the album Sing We Noel: Christmas Music from England & Early America (Joel Cohen, director) recorded in 1978. I found the sound of the music to be unique and hauntingly beautiful. It came to mind recently when I heard music that seemed to have a similar unique sound. I've since learned that Sherburne is part of a body of early American music that's sometimes referred to as Sacred Harp music. There are a number of YouTube videos that provide additional information and various performances of this music. Here are links to some of the videos that have contributed to my understanding of this music:
I'm in the process of redesigning and reorganizing this website. That means I'll be removing some old information that is no longer up-to-date. As time permits, I will update and repost articles that may still be of interest. Please bear with me during these changes.