And for heaven’s sake, never, ever return to sender.

Last night, I heard it. Not a roar or a whisper. A sound like a glacier calving, but slowed down a thousand times, stretched into a low groan that vibrated through the floorboards. My neighbor’s dog, which never stops barking, went silent. Then it whimpered. Then it hid under the bed and refused to come out even for cheese.

I understand now. Gredg is not a creature in the normal sense. It is a law. A law of oversight, of forgotten things, of objects that go missing and reasons that vanish. It lives in the space between I put it down somewhere and I can’t find it anywhere . It feeds on the moment you realize you’ve lost something you didn’t know you had.

The gredg does not forgive.

It is an unusual word, gredg . It does not appear in dictionaries. It has no known etymology, no cousins in Romance or Germanic tongues. It is, by all accounts, a typo or a forgotten name.

That low, slow groan, coming from inside the wall, inside the sentence, inside the space between this word and the next?

But worse: the gredg does not forget. And now that I have said its name, now that I have written it down, now that you are reading this—it knows you, too.