Thank you for "resurrecting" these songs. (Zombie Jamboree by the Kingston Trio just popped into my mind as I said that, but that is definitely NOT mournful, spooky, or lonesome.) I, too, enjoy "I'm So Lonesome I Could Cry" as Wanda Degan taught an Ionian version. The reason for my thanks is I was wanting something spooky for dulcimer and wasn't happy with what I found among my own music.
The mention of "She Moved Through the Fair" is perfect for me. I've loved & been haunted by it for a long time. The same was true about the baritone dulcimer, so, now that I have one, this is going to be my first real work for it. Tried to figure it out with SMN and what I came up with seemed flat. Went online and found an experimental way to tab it at Digital Tradition. I chose AbEbAb tuning and am dying to play it . . . well maybe I'll just hold a seance by playing it. The October meeting of my local folklore society has Ghost Stories as the theme. I could tell tons, but the group is really geared towards music and I like to challenge myself musically monthly, so I really want to chill everybody out with this piece.
BTW I know a few here play bowed psaltery and ages ago I played Tom Lehrer's "The Irish Ballad" on mine. If you know Tom Lehrer's work, you can appreciate it's satirical. On guitar I like to sing an old song, "The Legend of the Red Mill" from the Rudolf Friml operetta, The Red Mill. It has a great spooky refrain and, like "She Moved Through the Fair", it doesn't answer all the mysteries it raises.