Some fiddlers prefer to play this waltz in the key of A. Here you have Margaret’s Waltz in the key of G, where I’m used to playing it.
This is a pretty piece. It has migrated to American fiddling as well as any other tune from Ireland, not counting Red Haired Boy….and Devil’s Dream….and….well let’s stop there.
For waltzes, you won’t find another Irish one that is played more than Margaret’s. [Update: this is apparently not an Irish waltz. But, it is from the British Isles.]