I received the following email from Miguel Garcia.
My root ancestor is DIEGO GARCIA, he had porcion 78 in the jurisdiction of Camargo, I have been searching during even years, trying to get his birth date and the name of his parents, if anyone knows this information, I am willing to swap it for some info I have.
If you have any information on Diego Garcia or if you are descendant of his please contact Miguel Garcia at firstname.lastname@example.org.
More information about Diego Garcia:
Diego Garcia was awarded Porcion 78 back in 1767 in the jurisdiction of Camargo. This porcion contained 5756 acres of land. He is also briefly mentioned as the owner of this porcion in a free eBook by Google titled The Laws of Texas 1822-1897.
The following website might also be helpful:
It lists a lot of genealogical data and many leads.