Parents:
Thomas Smithers
Nancy (Anderson) Smithers

Mary was married 2x, lst marriage was short lived.

+1Nicholas B Rodgers Jan 28 1836 McDonough he died 1840
IL State Archives, Marriage Records - IL 1763 - 1900, IL Secretary of State, http://www.ilsos.gov/GenealogyMWeb/marrsrch.html.
"RODGERS, NICHOLAS B, SMITHERS, MARY JANE, 1836-01-28 , 00A , 0013, 00000094, MCDONOUGH."

+2Thomas Jefferson Pennington April 15 1841 McDonough
IL State Archives, Marriage Records - IL 1763 - 1900.
"PENINGTON, THOMAS J, ROGERS, MARY JANE MRS, 1841-04-15, 00A, 0040 , 00000335, MCDONOUGH."

[as you see she used her previously married name to marry Pennington]

1830 Kentucky Adair Columbia, p 38
Thos Smithers
1 m under 5 Robert
2 m 5-10 James, John
1 m 30-40 Thomas
1 f 5-10 Susan
1 f 10-15 Mary Jane <<
1 f 30-40 Nancy.

1850 Census Thomas J Pennington Age: 40 Birth Year: abt 1810 Birthplace: Kentucky Home 1850: McDonough, Ill Male Family Number 962
Household Members:
Thomas J Pennington 40
Mary J Pennington 30
James W Pennington 15
Allen J Pennington 13
Thomas F Pennington 8 1842
L M C Pennington 6 1844
Mary J Pennington 3 1847
Jemima H Pennington 1 1849
Catherine R Rogers 13 Mary dau fr lst marr to Rogers

1870 United States Federal Census about Mary Pennington
Age in 1870: 52 Birth Year: abt 1818 Birthplace:Kentucky
Home in 1870:Industry, McDonough, Illinois
Race: White Gender: Female Post Office: Industry
Household Members: Name Age
Thos Pennington 60
Mary Pennington 52
Stewart Pennington 26
Nancy Pennington 23 Nancy Jane
Stephen Pennington 19
Alonzo Pennington 12
Eliza Haines 12

1880 United States Federal Census about Mary J. Pennington
Age: 61 Birth Year: abt 1819 Birthplace: Kentucky
Home in 1880: Industry, McDonough, Illinois
Race: White Gender: Female
Relation to Head of House: Mother-in-law
Marital Status: Widowed
Father Birthplace:Virginia Mother Birthplace:Kentucky
Occupation: At Home
Household Members: Name Age
Horris Cobb 36 [Horace]
Nancy Cobb 33 Mary's dau Nancy Jane
Mary A. Cobb 6
Effie G. Cobb 2
Mary J. Pennington 61 died 1901

Mary J Smithers
Spouse: Smithers Thomas
Parents: Anderson Thomas Nancy
Birth Place: KY
Birth Date: 1818
Marriage Date: 15 Apr 1841
Death Date: 1 Oct 1901
Sources; provided by Nena Smothers

Re: Small obit
Mary Jane SMITHERS
OBITUARY: Mrs. Mary J. Smithers Pennington, who died 1st October 1901, was buried in the Cemetery on their farm in Industry Township. Source; http://archiver.rootsweb.ancestry.com/th/read/SMITHERS/2003-07/1058611948