Hello to the list , I am researching Martin W Gray who married Rachel Blackshear in Hardin County .They moved to Gibson County before 1850 . Rachel died in 1869 in Obion County . All i have so far is the 1860 census showing the family in Obion County . Was there a county line change between Obion and Gibson Counties between 1850 and 1860 ? J E ( Jake ) Boroughs