The letter appears to be written in absolutely tiny print on the back of blank matchbook. But after you study it for a bit, you have a moment of vertigo and then can't decide if the matchbook is normal sized and the print tiny, or the matchbook is huge and the print normal sized. Somehow, both seem true at once.
Dear Monks,
As weird as it sounds, either everything in our world is growing, or all the people here are shrinking. Either way, everything is getting bigger, which is very disturbing since it includes our houses, clothes and animals!
It begin on the day when the Council of Wizards and the Council of Scientists, in a rare moment of agreement, marched down to the Great Temple, and declared that the Goddess was an obsolete belief and stood in the way of progress. I was there as a reporter for Biweekly World Recorder, and I saw it all: the arguments with the priestesses, the destruction of the goddess' statue by the Chief Wizard and the Chief Scientist, and the goddess appearing in a form made of storm and fury and declaring her curse.
Anyway, since then, everything has grown (or we've shrunk). Now everyone's only three-fourths the size they used to be and nobody's clothes fit right anymore and we're still shrinking. It's not hard to see that soon we'll be hiding in the vast caverns of our houses, hunted by our cats, and living off of what canned goods we can manage to open. It's not a pretty picture.
I'm going to file this letter in the dead file -- stuff in there always vanishes eventually.