I want to share a book of old ballads I just learned about, "Songs of the West", which is on the Gutenberg website. https://www.gutenberg.org/files/56625/56625-h/56625-h.htm#NOTE_086.
I discovered it from a murder mystery by Laurie R. King called "The Moor" set in the Dartmoor area of Great Britain. One of the main characters is a man named Sabine Baring Gould. It turns out he was an actual person who lived from 1834-1924 and collected ballads from taverns and gatherings in where there's a great singing tradition. Many of the songs in this book had been handed down from as far back as the 16th C. and before. There is even mention of the Mixilodian mode!!
I think there are also actual recordings somewhere which I would love to hear but I don't know how to find something like that. Does anyone know anything about this? Otherwise, enjoy!