Does anyone know if there was something note worthy that was happening in the mid to late 1840's in Carroll Co. that might have had a lot of people migrating there? I am following a couple different lines in my family & they left Crawford Co., MO in the late 1840's to settle in Carroll Co. AR in time for the 1850 census but then most of them returned to Crawford Co., MO just a year or two later. I've been wondering why several families would make such a long move only to return a couple years later. Gold? A new mine? Free land? Any help appreciated.