There's a good collection of early Copper Family recordings on Topic that has 'The Lark in the Morning' and stuff like that on it. Think it's 50s & early 60s stuff.
I'm sure that a lot of the field recordings that Alan Lomax did would be worth investigating too (sorry, don't know as much about this as I'd like to!).
― NickB (NickB), Tuesday, 16 August 2005 09:55 (eighteen years ago) link