"A Halloween Wraith" by William Black, to be honest, is a thoroughly forgettable short story. It takes place for the most part in Scotland… so there's that.
It's proof that just because something is old, that doesn't make it a "classic." What it is—is mostly a meandering political scree from the 1800s with a ghost costume thrown onto it, and I have a feeling it was boring even then. The biggest claim I can make about this story is that it is hard to find, and it is actually truly pretty obscure.
So there you have it. It just took twenty-two months of this blog with obscurity in its name to finally get to a piece of fiction that is genuinely obscure, other than my own fiction, of course. That's WIO's promise for you; if you consider it in terms of geological time, I delivered you actual obscurity almost instantly.
Back on topic, where could you find this story? No idea. First off, I'm not sure why you want to, and I only stumbled upon it because it was included in a collection of horror stories in the public domain, made cheap, sold on audible for a few months, before going defunct, and was taken down.