The 1850 Arkansas Census lists Burrell Brewer and Benjamin Brewer as being born in South Carolina.
Sarah Brewer 69 F NC appears in the household of Barnwell P. Barnwell in Arkansas, Saline County County, page 93. Benjamin Brewer appears on page 103. It appears that Barnwell lived in GA, AL, MS, then AR. Benjamin lived in GA, AL, then AR. Borh moved to AR about 1847.