It’s believed that the original wording was colly bird, a European blackbird known to have a very rich melodious song used in courtship and mating. Thus it seems reasonable that today we would sing calling birds instead of colly since common blackbirds aren’t generally thought of as romantic. Of course there would be four, one for each voice SATB, the most common of chorus combinations. Together they provide the fullness of tonal range. Together they all sing their own version to tell the whole song. So it is with the telling of the four canonical Gospels, four perspectives on one whole. Each voice reflects an experience on the gift of one life, calling each of us in to a relationship with our Lord and Savior Jesus Christ.