Thomas D, Duncan, son of John A. and Katherine Norman Duncan, was born on 16 August 1866. He was reared on the family farm and received his early education in the common schools and two years at Ft. Deposit, Alabama, He then engaged in teaching with a first grade teacher's license He later became an assistant in the schools of Ft. Deposit. He moved to Manningham, Alabama and built an elegant school house and was principal of the Manningham high school for two years. In 1889, he entered the Medical college of Alabama at Mobile and graduated March, 1892. DR. DUNCAN began the successful practice of his profession in the southern portion of Montgomery county. He was appointed a member of the board of revenue of the county from the Fifth board of revenue district March 1903 by Governor William D. Jelks. He was in favor of all progress consistent with economical administration of county affairs and an earnest advocate of the improvement of the public highways. Dr. Duncan was married on 7 September 1892, to Zerverah Sellers, a native of Montgomery County, Alabama. They had three daughters, Ala-Lu, Lucille, and Beuna Mae. Their two sons, Thomas and John William, died in infancy. Duncan was postmaster at Fleta, Alabama, appointed under President Theodore Roosevelt's administration. He also owned a plantation at Fleta, stocked with fine cattle and blooded horses, in which he took a great interest. In connection with his practice, he was the physician for Waltar Brothers' convict farm at Sprague Junction, near Fleta.
He died on 17 November 1938 in Montgomery, Alabama.
From the guide to the Thomas Duncan ledgers MSS. 0457., 1889-1926, (University Libraries Division of Special Collections, The University of Alabama)