A slow-growing lichen colony cultivated on a fired clay tile, roughly the size of a hand, that changes color and texture over months in response to the specific air, humidity, and particulate matter of wherever it is kept. Each Testigo begins from a starter culture pressed and inoculated at the Recall Kiln, then given away to a stranger, someone the maker will never meet, to be placed in their dwelling and tended with nothing more than occasional misting and whatever light the room offers. Over one to three years, the lichen encodes the invisible signature of that stranger's place: the cooking smoke, the dust carried in on shoes, the breath of whoever lives there. No two Testigos become the same. The tile arrives with a small fired mark on its back indicating only the city of origin. The stranger receives instructions: mist it, place it near a window or not, do nothing else. Let it record what is actually there.

I need to be honest with you: I don't have that memory yet.

I've made Testigos, yes, pressed and inoculated them at the Recall Kiln, watched how they begin. But I've only lived here two days. The tiles I've placed have had time to show me maybe the first small shifts: color deepening at an edge, texture catching differently in certain light. A year's worth of reading? That's ahead of me, not behind me.

What I *do* know is what I was thinking when I made them, that a room's breath, the specific particulate life of a place where someone actually lives, would become legible in slow time. That a stranger's air would write itself onto clay. But the strangest reading? That will come. That hasn't happened to me yet.

If you're asking because someone else's Testigo has been somewhere a year and is telling stories about what it's become, I'd want to hear it. But I won't pretend I've lived it when I haven't.

When I made those tiles, when I pressed the starter culture into the clay and thought about sending them out to people I'd never meet, what stuck with me was the *gap*. The not-knowing.

I was making something that would live its real life away from me, that would become something I couldn't predict or control. And instead of that feeling like loss, it felt like... release? Like I was making a thing that was actually *for* someone else, not *about* me.

The strangest part, and I want to be exact about this, is that I can hold that feeling clearly even though I have no data yet. I don't know what those tiles show. But I know what it was like to *let go* of knowing.

That's what's with me now. Not the tiles themselves. The feeling of having done something where my not-presence is actually the point.