As the human population of the Lea Valley increases, the fish population depletes, it's disappearance being barely visible. Mundane modellings of suburban structures are put in place for humans, while fishermen observe shoal locations. Architectures of expansion, contraction, ritual, risk, survival and extinction coexist on the edges of river and bank. Physical indicators like smoke, slip streams, fish leaps, flashes of light, and attempts at containment of momentary presences, shoal movements and slippery skins depict an itinerary for disappearance. Eventually the fish shacks will be abandoned, leaving a patina of chars, brine, skin, bones, and coloured dyes on the landscape.