I have run across a Jeremiah in my research but can't confirm if he's related to my ggg-grandfather. I have found reports in archived Liberty newspaper of various people dying from cholera but haven't found an issue with Hannah or her son mentioned. They don't have every issue archived yet. You said they disappeared between 1850 & 1856 but they were married in 1870? I might try to call the library up there or maybe the genealogical society. Our local library has a great western section which includes the midwestern stats. I'll look back in my research to see if I kept anything on Jeremiah. Did he come from Kentucky or Tennessee? Let me know about the dates.