I'm helping a descendant of John Jackson Horton, brother of Harriet Louise Horton Heath -- they came west together across by boat. I'd love to see an image of the marriage certificate you have -- where they married, who were the witnesses, etc.
The John Jackson descendants have photos of him -- despite the pox remnants he was a handsome man. Maybe they have photos of Harriet, I don't know. But I'd love to share info.