Helen Hartness Flanders was a collector who began recording singers in Vermont USA in the late 1930's. She started collaborating with other collectors including Fanny Hardy Eckstorm in Maine and expanded her collecting efforts with the help of her colleague Marguerite Olney. Eventually her collection included over 3000 recordings from people in homes and woods camps throughout New Englnad. I have been transcribing those she found in Maine.
You can find out more about her here
https://sites.middlebury.edu/flanders/

The recordings have been digitized but are low quality and, though there is an index, they are difficult to find as they were randomly transferred to 45 minute cassettes and not organized, nor are there time codes. They are available at archive.org

Whenever I transcribe a song I notate the location with a recording nmber and time code. My book "Bygone Ballads of Maine Vol 1 Songs of Ships and Sailors" has a complete index of the location of all Maine seafaring songs I could find.

I'm currently working on volume 2