JJ,

There is probably more of the Columbia recordings available on CD - those just happen to be the ones I've bought from local shops. Columbia probably has a online catalog.

Nerd -

You're probably right with the Skiffle craze. And really, I think that the Clancys & T.M. took their cue from their families get-togethers in the pre-war days in Ireland. That's what they always said and we have a bit of proof with the connection of the early recordings of Tommy's mom Sarah's friends, etc.