Hello Curtis..this is a tough one for Gallion genealogists.There were no McMinn Co. Gallion in 1840 but there were three "Gallon" households in the 1850 McMinn Co. census (James 71 yrs, James 31 ayrs, and Will 29 yrs).These Gallons do not "connect" well to the Gallion lineages but it's not impossible that they were Gallions.We just don't know.So your Elizabeth might well have been one of these McMinn Co. families.They do not show up later in TN records as Gallions.
However, your information that Elizabeth shows up later in Benton Co., Ark. is interesting.A Gallion family did move to Benton from Bradley Co., TN ca. 1845.Another Gallion family moved to Benton Co., Ark. from Virginia ca. 1859.The descendants of this Virginia Gallion clan still live there today.It's not impossible that your Elizabeth was a member of the Bradley Co. Gallions who moved to Benton Co., Ark.McMinn and Monroe are between Bradley and Roane Cos. and the Gallions moved to and from Roane Co. to Bradley Co. between 1835-1850.
Were there any familial connections between the Pearces and Gallions of Benton Co., Ark.