The way I understand it, Miguel Flores, the soldier, and Rita Romero, the married wife, are the parents of the illegitimate child, Jose antonio. Jose Antonio de Cardenas, and his wife, Juana de Dios Tijerino, adopted the child. It says soldiers in plural, but most likely the only soldier was José Antonio Cardenas.

Hi! Well, I think so, it definitely says "por adopción". But what really catches my eye is the crossed out word. Where they always state if they are legitimate or illegitimate children, they seem to have crossed out another word, and then wrote something else above.

I can't fully understand any of them tbh but it looks like "hijo adulterino", which was a child born from a cheating spouse. The word on top might say "espurio", which matches the theory.

Also, it says the father is single while the mother is married. So maybe that's why they adopted the child? Also it seems interesting that the word "soldado" is there, but I wouldn't know if the father was a soldier (maybe that adds information to this story) or if it means something else (since it also says the adoptive parents are "soldados" and I don't think women could do that back then?)

Hope it helps!