How about ...

Blackwater side :

One (E) evening fair, I took the air,

O, down(G) by Blackwater side,

It(E) was gazing o'er & around me,

That the Irish(G) lad I espied

A quick glance through the Christy Moore songbook :

The Little Drummer has just Cm & Bb,(or D & Em etc) I'm sure you can figure when it changes. I noticed that one myself earlier this evening.

As I Roved Out : Am & G etc

And The Well Below The Valley just Dm - though the version I do has a few more that that !

There's others, but it's 3.30am.

Good luck

Hilary