Synopsis
Mr. Carlin shows his antique mirror to Mr. Spangler, who questions an odd black spot he sees on the mirror.
History
First publication: Startling Mystery Stories, Spring 1969
Review
This story reminds me of The Night Gallery tv series. Very short but well-written. You can see what will happen early on, but it is the journey that makes this enjoyable, not the reveal.
Videos
We have the story in these editions:
Skeleton Crew, hardcover, G. P. Putnam’s Sons, 1985-06-21