You're welcome! It's possible we may have a match. I was never able to find out what the initials stood for, but I believe Robert and his wife C. Shears ended up divorced shortly after their marriage as he remarried.
It wasn't uncommon in Mexico for the baptism records to be incorrect when it came to the parents, especially the father's. Carmen may have possibly said any name for propriety [in this case if she stated Juan, it's quite funny considering Robert started the Juan
Cortina wars in Brownsville].
As far as I'm aware, I haven't found any
Garland family members in my tree. It's possible that the G was part of the mother's last name [as they usually have about three to four last names in Mexico].
Jessa.