Anthology of the American Hymn-Tune Repertory
Tune name: Cambridge Short
Original source: Damon's Psalter, 1579
First American appearance: The Psalms, Hymns, and Spiritual Songs of the Old and New Testament (The Bay Psalm Book), Boston 1698
Source of this image: The Psalms, Hymns and Spiritual Songs (The Bay Psalm Book), Boston 1698
The melody moves from line one to line three. Lines two and four are the bass part. Given the convention of congregations singing only the Psalm tune, it is curious that the bass part was added.