it's cut and paste, primarily - though I have to admit I only have 'The Singing Tradition of Child's Popular ballads' not the full Bronson - and I've only transcribed up through #40 - still have 416 pages to go.

text of childs can be found at Child Ballads Site

url=http://ling.lll.hawaii.edu/faculty/stampe/Oral-Lit/English/Child-Ballads/child.html