Beyond the southern gates of the Great Silt Plaza, the stonework underwent a deep living transformation.
Entry halls 401 through 600 had not been carved from cold pale limestone or dark fiery hard speckled rock. The walls here were composed of a dense, calcareous tufa quarried from ancient freshwater wetlands, stone-hard with the roots of giant horsetails, reeds, and water-ferns that had grown. Just then, the world was young. In the ceiling vaults eighty arm-lengths above, circular terracotta vents opened into eight hundred and forty dry storage silos, each thirty paces deep, lined with glazed green pottery plates sealed with sheep fat and beeswax. These silos had been built by the agrarian guilds of the Fourth Epoch, who understood that when empires collapse beneath salt water, the survivors don’t starve for lack of gold or iron. They starve because no one remembered to keep the wheat dry.
Here lay the agricultural memory of an extinct planet: seven billion grain husks, legume pods, and tree-nuts preserved in carbonized cold air against the rising black ocean. Each silo was tuned to maintain a sky moisture content of exactly fourteen percent. It was dry enough to prevent fungal mold, yet humid enough to keep the dormant plant embryos from desiccating into sterile dust. Inscribed along the terracotta rims were the ancient training indexes. Symbols denoting salt limit, root depth, germination speed under twilight conditions. The exact stone balance needed for each crop to flourish in river silt.
