Jim,
Good to see you've made great progress on Camilla and family.
"Knowing that "divorce" was a rarity and usually a social stigma in the 19th century, I was curious as to why Constance Camilla Rondeau and John Soto, Sr. divorced? Undoubtedly, we can't know the whole story;..."
You may already know this, but in the event you do not:
Very early Alabama divorce applications had to go through the state legislature. I don't know if the divorce you mention would fall within that period or not; however, I've seen some of the divorces posted online. As you might expect reasons were given.
Margaret