I can't help out, but I can relate a tale I recall from Methodist Sunday school, back in my days of flaming youth....
    Charles, brother of Methodism's founder John Wesley, wrote the songs for the original Methodist Hymnal. When stuck for melodies, he'd travel down to the docks, where drunken sailors would predictably stagger by, caterwauling some exotic chantey or another. Charles would transcribe the notes, and develop them into hymns.
    This didn't sit very well with brother John, who confronted his brother about using barroom music in praise of the glory of God. Charles responded to his objections with "Why should we let the Devil have all the good music?"