Apparently, something happened between Zachariah and his first wife Mary Ann Talbot in the late 1840’s. Zachariah had moved to Michigan and married his second wife Esther Chaffin. Mary Ann was reported as a widow in her obituary, but it is not the first time I have seen something like that stated in an obit when a spouse remarried. Still, was she aware of the remarriage? Did she assume he was deceased ? Did they divorce?
I can find nothing that gives me clue as to the above. Mary Ann's obit appeared in the The Tri-County Review, Alliance OH
according to his son’s bio in ~”Portrait and Biographical Album of Jefferson and Van Buren Counties, Iowa. Containing Full Page Portraits and Biographical Sketches of Prominent and Representative Citizens of the County, Together with Portraits and Biographies of All ... Governors of the State”- page 186 (Google eBook)