My mother used to say that a map does not draw the land: it holds it down. I did not believe her until the night the Orvella lighthouse stopped existing and all that was left, trembling, was the line I had drawn that afternoon.
The White Tide is not water. It is forgetting in the shape of fog. It advances unhurried from the horizon and, where it touches, things do not drown: they come unstitched from the world's memory. First the names go. Then the streets. In the end, people do not even know there was anything to lose. That is why cartographers of the void exist, though the Council calls us superstition and pays us in secret.
That afternoon I was on the Orvella quay finishing the outline of the bay. My mother's ink is black with a blue underneath that shows only when you tilt the paper, as though the sea had got into the bottle. I drew the lighthouse, its twelve windows, the crack in the third step. I wrote the name. And then the fog arrived.
The townspeople watched it the way you watch rain: without fear, because they had already begun to forget that they ought to feel any. I saw a man say goodbye to his daughter and, three steps later, look around for her without remembering who he was looking for. I shouted. Nobody heard me, because they were beginning to forget me too.
I pressed the map against my chest. And the lighthouse, which was no longer there, went on burning inside my line of ink. A single stubborn flame on a sheet of paper. The twelve eyes of its windows looked out at me from the drawing as if begging me not to let go.
I did not let go. I walked backwards, inland, with the fog licking at my heels, and for the first time I understood what my mother never spelled out for me: ink does not describe the void.
It stops it.
That same week the commission arrived. An envelope with no sender, sealed with a broken anchor. Inside, a single sentence in the handwriting of a frightened official: Map Isla Candela before we lose it. And underneath, smaller, as if he were ashamed to write it: it is the last one left with people in it.