"Rice Duncan, a native of South Carolina and a schoolteacher in his earlier years, was one of the early settlers in St. Clair county, this State. Thence he removed to Morgan County, where he farmed for some years, then located near Salisbury on the county line, where he improved and became the owner of one hundred and seventy acres. He was never idle, and having a wonderful constitution lived to be eighty-three years old, and during his entire life was probably unexcelled in industry. He reared a family of ten daughters and two sons, one of the latter, Sidney Duncan, having been Judge of Morgan County several years."
Source: PORTRAIT AND BIOGRAPHICAL ALBUM OF SANGAMON COUNTY IL (Chicago: Chapman Bros). 1891.

Rice Duncan was a son of James Duncan and Averilla Shelton. He was married 15 March 1806 in Adair County, Kentucky to Barbara Antle, and they had 4 children:
Delilah married Alexander Buchanan and moved to Fannin County, Texas
Matilda married Levi Scott and moved to Hancock County, Illinois
William Taylor married Clementine French and moved to Macoupin County, Illinois
Sidney Smith married Mary A. Rodgers and resided in Jacksonville, Morgan County, Illinois

Rice Duncan married 2nd to Luranah Reatherford on 5 October 1812 in Adair County, Kentucky, and they had 6 children:
Susannah married Andrew P. Tannehill's & moved to Monroe County, MO & Benton County, AR
Nancy C. married Henry Antle and resided in Salisbury, Sangamon County, Illinois
Sarah B. Married George Good man and moved to Keokuk, Iowa
Elizabeth Jane married William Dorrell and resided in Menard County, Illinois
Ella Ann married Samuel Coleman and resided in Salisbury, Sangamon County, Illinois
Avarilla married Lemuel Miller