Simpson was born in Franklin County, Tennessee. He served in the Arkansas General Assembly in 1838 and was later a Justice of the Arkansas Supreme Court in 1842. He represented Texas in the Provisional Confederate Congress from 1861 to 1862 and was a senator in the First Confederate Congress and the Second Confederate Congress from 1862 to 1865.
|Confederate States Senate
|Confederate States Senator from Texas|
Served alongside: Louis Wigfall
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de:Williamson Simpson Oldham