"She moved through the fair" was written by Padraic Colum 1881-1972. Here's a link to a page about him The irony is thta, though he was fanous and wrote a lot of good stuff, the piece that's most well known is this, and most people think it's traditional. Well, it is now, anyway.

They're good verses Peg - but myself I feel the story gains by being pared to the bone. In fact when I sing it, I leave out the verse about the people and the sorrow that never was said, because that was how I heard it first from Margaret Barrie, and it seems complete that way. It's a beautiful verse, but says more than needs to be said, to my mind.

And it has always been "dead love" for me. I've seen it printed with the last verse as "young love", so maybe that is how Padraic wrote it. I find it much more powerful with "dead love" - especially with the promise that they are still getting married - in other words, he'll be dead soon enough himself. Too eerie? Well, if someone isn't at ease with eerie is this the right song for them to be singing anyway? Anyway, whether it's sung as "dead" or "young", I think she's died sure enough.