I knew where it was mailed from, because the zip code of the post office which cancelled the stamps was clearly visible. It was mailed from the zip code 60666. The Zip Code of the Beast, as Loretta and I called it. Which, by the way, happens to be the post office inside Chicago, OHare international. Not a post office in Chicago near O'Hare airport, but the post office inside the airport.
Nobody uses a post office inside an airport.
Certainly no rational person. It's part of his fiendish, twisted plot, that's what it is. But, just to be sure, Loretta and I called everyone we could think of who might have sent us a Christmas present. Mostly, this was my family, cousins and such, since many of them are in Illinois. We told each one the story.