epístola.

(a loanword from Spanish)

Headword: 
epístola.
Principal English Translation: 

the Epistle; apparently somethng that could be preached by a subdeacon
(a loanword from Spanish)

(central Mexico, 1613)
Annals of His Time: Don Domingo de San Antón Muñón Chimalpahin Quauhtlehuanitzin, James Lockhart, Susan Schroeder, and Doris Namala, eds. and transl. (Stanford: Stanford University Press, 2006), 236–237.