Letters in the Gloom

We were locked inside. We didnt know what was happening, not truly. We knew not to go outside. We knew that it was dangerous out there. And we knew that we were alone in our horror. Until the letters started to arrive. Whatever strange miasma that lingered outside, invisible yet heavy, it allowed words to slip through. They appeared at doors or windows, in places you could reach without inviting it inside. If you threw a letter into it? It vanished. Reappearing somewhere else, for some other lonely soul to read. Who knew if it reached who you wanted. But at least it reached someone. Letters in...