The quipu (khipu) was the Inca Empire's knotted-cord recording system, spun and plied from cotton and Andean camelid fiber. A thick main cord carried pendant cords hanging in measured rows, each knotted at precise intervals to encode counts, census data, and tribute records across a realm with no written script. Cord color was semantically load-bearing — it named what was being counted — while the natural undyed camelid wool itself read as a deep chocolate-umber ground, never a pale or ivory tone. This system channels that vitrine-dark gloom hung with ochre-gold cords: a physical spreadsheet of knots, legible by touch as much as by sight.