I just learned a bit more so I wanted to write again in case we have information to share. My father, Emma Porter Reilly's (m. Thomas Reilly) grandson, is still alive and has a letter from his uncle or cousin, H.J. Porter, who was living in Cartagena, Columbia in 1901. I have been looking at the descendants of David Rittenhouse Porter because there is a family resemblance to my father and his brother, however, my dad does not think he is related to that family.
I am going crazy trying to figure this out - any help would be appreciated!