The Mexican calendar stone / by Philipp J.J. Valentini ; (from the German) ; terra cotta figure from Isla Mujeres, northeast coast of Yucatan ; archaeological communication on Yucatan, by Augustus Le Plongeon ; notes on Yucatan, by Alice D. Le Plongeon ; compiled and arranged by Stephen Salisbury, Jr.

Licence: Public Domain Mark

Credit: The Mexican calendar stone / by Philipp J.J. Valentini ; (from the German) ; terra cotta figure from Isla Mujeres, northeast coast of Yucatan ; archaeological communication on Yucatan, by Augustus Le Plongeon ; notes on Yucatan, by Alice D. Le Plongeon ; compiled and arranged by Stephen Salisbury, Jr. Source: Wellcome Collection.