Walker was a son of
Jonathan Hoge Walker and Lucy Duncan who were married in 1790. Duncan S. Walker was their second of eight children and the oldest who survived to adulthood. Walker was originally from the
Carlisle, Pennsylvania area and moved to
Mississippi with his brother
Robert J. Walker in the 1820s. Their prosperous cousin
Stephen Duncan already lived in the lower
Mississippi River valley. He, like his brother, was a
Jacksonian Democrat. In 1824 he was selected as a second lieutenant of the Natchez Fencibles militia company. In 1828, Walker ran for a seat in the
Mississippi House of Representatives from
Adams County. He served in the
12th Mississippi legislature. == References ==