Yep, the mirror that Harold Whitney got from an odd old man really does let you see what people will look like in the future—a situation that we’d normally mark as a mere time phenomenon and tag as a simple kind of chronoscope. But the story also has a twist at the end that makes me wonder whether the old man was also a time traveler.

After turning back the hands on the campus clock tower, star athelete Ambrose McCallister finds himself at a stadium in ancient Greece with no memory of who he is.