Just a little side note. In threads here on railroad songs you'll find mention of Norm Cohen's compendium 'The Long Steel Rail'. He published so much on folklore, 'Journal of American Folklore, etc.,) that folklorists thought he was one of them. I guess maybe he was, but he was also a worldclass researcher in chemical kinetics. (He's now retired from that, living near Portland, Oregon and working on a temendous bibliograph of American songbooks. Although I had known about him from kineticists at NBS (who knew nothing about his folklore interrests) I didn't meet him until after both of us had retired from science.