I’m hoping someone will be able to tell me the name of a Alfred Hitchcock story I read part of a long long time ago. It was about a guy who would see movement out of the corner of his eye, but when he looked there was nothing there. Spoiler alert: It tuned out he was seeing creatures. I don’t remember the name of the the creatures, but I’m sure their name started with a P. That’s all I can remember. I hope someone can tell me the name of this story so I can finish it.