Hello Laurie, I have Juan Villarreal and Guadalupe Vela in my tree. They are ancestors of my wife. I have the marriage date of 9-20-1870 for them in Reynosa. I checked the civil registration records but could not find it. Maybe it is a church record. I got the date from Rosie Flores also a descendant of theirs. I do not have any parents for Guadalupe but for Juan, I have Pedro Jose Villarreal and Maria Guadalupe Flores. I’ll continue to dig. Also, that marriage in Hidlago that you have, was it signed by a priest? If so then maybe there is also a church record for it in Hidalgo County.