This notation for the number four (nahui) has been carved from the compound personal name Nahui Olintzin (below). It consists of four circles in a horizontal row. Each one has a color. From left to right, the colors are red, yellow, white, and red again.
covers ruling men and women of Tecamachalco through 1593
numbers, números, ones, unos
nahui, four, https://nahuatl.wired-humanities.org/content/nahui
Ofelia Cruz Morales
The Codex Quetzalecatzin, aka Mapa de Ecatepec-Huitziltepec, Codex Ehecatepec-Huitziltepec, or Charles Ratton Codex. Library of Congress. https://www.loc.gov/item/2017590521/
The Library of Congress, current custodian of this pictorial Mexican manuscript, hosts a digital version online. It is not copyright protected.