1917 print showing, at top, Tlaloc mask now missing (cf. photo at top-center); goggle-like eyes, nose bar, curving mustache, upper teeth, bar and trapeze symbol at both sides. "Fig. 67. Uxmal. House of the Nuns. North building. Main facade (south front). Tlaloc-like mask accompanied by the symbol of the year. Cornice of the mask column of the frieze and the highest mask of column B (compare to page 65, fig. 59)."
Scanned from Eduard Seler, “Die Ruinen von Uxmal,” 1917 (fig. 67).