I was looking in the PARS website on Capitan Miguel Caldera and I came a page where at the top of the page around line 7 it talks about the Chichimecas in Mezquitic.
At the bottom of the page it mentions "Valparayso (Valparaiso)" which is in Zacatecas. Along with Tlatenango, San Andres.
The year is 1592 which is the earliest reference of the existence of Valparaiso.
http://oi64.tinypic.com/2hxlls0.jpg
I found it in this website:
http://www.archivesportaleurope.net/web/guest
refernce no. MEXICO,220,N.30
imagen 31
http://pares.mcu.es/ParesBusquedas/servlets/Control_servlet?accion=3&&t…