Found a document that is dated 1618 and talks about the herrederos of the Haciendas of Sombrerete, Zacatecas, Mexico.
The reference no. is: MEXICO,29,N.11
To enter in Pars website:
http://www.archivesportaleurope.net/web/guest
It starts on pg 9 in regards to Sombrerete and continues on after each page.
1618 Document Testamento of
What is interesting this document starts out talking about "Negros Cimarrones" (Rebeldes).
Then on Pg 9, is when it shifts over to Sombrerete, The Testamento.
http://oi57.tinypic.com/oa7rx0.jpg