Individual Details

The gedcom also has a child Mary born 1856, which isn't likely with amarriage date in 1860. Where is the error?
In 1870, this family is listed with him as Lafayette Duncan, so haveentered data "assuming" that is his middle name. Also the child listedonly as Abraham in gedcom is listed as Francis in 1870, but age wouldhave birthdate of 1859-60. Since there is no other child older thanMahulda, I have tentatively put Francis as Abraham's middle name.

Birth	12 Oct 1838	Belleville, St. Clair Co., Illinois
Census	1 Jun 1850	Actual enumeration date 12 Nov 1850, Twelve Mile Prairie, Dist. 8, St. Clair Co., IL, pg. 202; Slathier [sic] Duncan, 13 (1836-37), born St. Clair County.
Census	1 Jun 1860	P.O. Freeburgh, Twp. 2 Range 7, St. Clair Co., IL, pg. 155; Note: Actual enumeration date 6 July; Celetial [sic] Duncan, 22 (1837-38), born IL. He and his new wife are living with his parents
Marriage	22 Jun 1860	Belleville, St. Clair Co., Illinois - Mary Caroline LIVELY
Census	1 Jun 1870	P.O. New Athens, Twp. 2 So. R 7 N, St. Clair Co., IL, pg. 11; Lafayette Duncan, head, 32 (1837-38), born IL, laborer.
Death	21 Nov 1870	Twelve Mile Prairie, St. Claire Co., IL
Reference No		7072

Spouse	Mary Caroline LIVELY (1839 - 1907)
Child	Abraham Francis DUNCAN (1861 - 1928)
Child	Mahulda Hilda Adeline DUNCAN (1862 - 1943)
Child	Laura Jane DUNCAN (1864 - )
Child	Nancy Lucinda DUNCAN (1867 - 1880)
Child	Edward Benjamin DUNCAN (1869 - 1876)

Father	Abraham Matthew DUNCAN (1799 - 1876)
Mother	Jane MCDONALD ( - )
Sibling	Lucinda DUNCAN (1832 - 1880)
Sibling	Lucia DUNCAN (1834 - 1850)
Sibling	Mahulda DUNCAN (1838 - 1850)
Sibling	Mahala DUNCAN (1840 - 1860)
Sibling	Nancy DUNCAN (1842 - 1870)
Sibling	Sylvester DUNCAN (1847 - 1900)