The Inca scribes (known as armantus) used the quipu (knotted ropes) to record and store information about the immense holdings of the vast Inca empire.
In your marketplace they traded with you beautiful garments, blue fabric, embroidered work and multicolored rugs with cords twisted and tightly knotted.
All of the examiners looked around to watch its progress and when it dissolved into silver mist Professor Tofty clapped his veined and knotted hands enthusiastically.