Hey Ron,
Just as Daniel mentioned, her email was the first I had ever heard of it...It actually was a short story, not really an article. It is an interesting superstition ...
If it was at all known, my mother and her Irish ways would have heard of it and mentioned it when we were growing up, but she never said anything like it so I don't think it was something that was common in the Northern area... Like NY, NJ, etc...
Did you read the story she sent by email? ... that might at least give some inspiration to writing something about it.
Best Wishes, liz