Not sure what key is "normal" I play it in Em because I have a melodeon :)

My understanding is that it was originally published in the people's key of Gm, but is most often heard these days in Em as posted by Lester. I'm not at home so can't look it up, but a date of the 1860s comes to mind, & it's in Gm in one of those small yellow Fiddlers Tune Books by Peter Kennedy.