Why not suggest an air (or at least song), f.i. an Irish one? As we all know there are lots of them, not just the Londonderry Air; we've got Raglan Road, Down by the Sally Gardens, or - expanding to the Scottish - The Last Rose of Summer...
Hmm. The Last Rose of Summer is actually Irish, with words written by Thomas Moore. His words were generally set to old (in his time) Irish airs, but at the moment I don't have his book handy to find the older name of the tune.
But The Last Rose of Summer is a great melody, with potential for wide-ranging interpretation, including (among other possibilities):
- being turned into a dance tune
- actually being sung*, with the concertina doing accompaniment and possibly interludes. One could sing Moore's words, but I also know of one parody (The Last Piece of Pudding), and many an Irish air has been used for numerous sets of words, sometimes even at widely different tempos, so it wouldn't surprise me if that were also true of this one. A bit of research might turn up some interesting possibilities for inspiration.
Roslyn Castle is another great tune with many widely varying interpretations already available, including by at least one concertina.net member (Danny Chapman = ratface), but that shouldn't prevent others from having a go at it. And it , too, has lyrics, I think for at least two quite distinct songs.