William A. Duncan was born in
Cashtown, Pennsylvania. He attended the public schools, and graduated from
Franklin & Marshall College in
Lancaster, Pennsylvania in 1857. He studied law, was admitted to the bar in 1859 and commenced practice in
Gettysburg, Pennsylvania. Duncan was elected district attorney in 1862 and 1868. He was elected as a Democrat to the
Forty-eighth Congress and served until his death in Gettysburg. He had been reelected to the
Forty-ninth Congress. Interment in
Evergreen Cemetery. ==See also==