I am looking at the PARS archives:

Did search: Tierras

http://www.archivesportaleurope.net/web/guest

And going through the list to see if I can find that kind of info on Nuevo Galicia (Jalisco) or Zacatecas. Seeing all kinds of things.

I came across this one reference number:

PATRONATO,295,N.28

Looking at the first page there is a hand with finger point to the top of the line:

http://oi60.tinypic.com/2vs5lwx.jpg