"The Return of Chorb" is full of eerie, supernatural occurrences. Because the story traces one man’s (Chorb’s) attempt to re-create an image of his dead wife, you can expect a fair amount of ghostly events going down. One perspective is that it’s all in Chorb’s head; he misses his wife, can’t deal with the grief, and so imagines a series of bizarre happenings to distract himself. It could also be that, in the fictional world of this tale, the supernatural is simply a part of reality. Weird stuff happens, ghosts make appearances, and we all just deal with it.
The disruption of time (both narrative time and Chorb’s "backwards" journey from the south of France) in "The Return of Chorb" is integral to understanding Chorb’s motivations.