1850 US Federal Census:
Name: Mary A Irwin
Age: 8
Birth Year: abt 1842
Birthplace: O
Home in 1850: Milford, Butler, Ohio
Gender: Female
Family Number: 1069
Household Members:
Wm Irwin 20
Stephen Irwin 34
Elizabeth Irwin 30
Mary A Irwin 8
John M Irwin 5
Mary J Eperson 15
==========================
1860 US Federal Census:
Name: Mary Ann Irwin
Age: 16
Birth Year: abt 1844
Gender: Female
Birth Place: Ohio
Home in 1860: Keokuk Ward 1, Lee, Iowa
Post Office: Keokuk
Dwelling Number: 893
Family Number: 832
Attended School: Yes
Household Members:
Stephen Irwin 44
Elizabeth Irwin 39
Mary Ann Irwin 16
John N Irwin 15
Wells M Irwin 8
Mary Nightingale 28
Cornelea Vanduzee 14
=========================
1870 US Federal Census:
Name: Mary C Sawyer
Age in 1870: 26
Birth Year: abt 1844
Birthplace: Ohio
Dwelling Number: 8
Home in 1870: Keokuk Ward 3, Lee, Iowa
Race: White
Gender: Female
Post Office: Keokuk
Occupation: Keeping House
Inferred Spouse: J E Sawyer
Inferred Children: Ellen Sawyer
H E Sawyer
Household Members:
J E Sawyer 28
Mary C Sawyer 26
Ellen Sawyer 3
H E Sawyer
Eligh Peters
Theresa Schaaf 12
=====================
1880 US Federal Census:
Name: Mary C. Sawyer
Age: 36
Birth Date: Abt 1844
Birthplace: Ohio
Home in 1880: Keokuk, Lee, Iowa
Street: Orleans Street
House Number: 1028
Dwelling Number: 302
Race: White
Gender: Female
Relation to Head of House: Wife
Marital status: Married
Spouse's name: Iram M. Sawyer
Father's Birthplace: Ohio
Mother's Birthplace: Ohio
Occupation: Keeping House
Sick: Lungs
Maimed, Crippled, or Bedridden: Yes
Household Members:
Iram M. Sawyer 39
Mary C. Sawyer 36
Ellen N. Sawyer 13
Hagen I. Sawyer 11
Stephen I. Sawyer 7
Elizabeth M. Sawyer 3
=========================
Name: Mary Crawford Irwin
Gender: Female
Age: 61
Birth Date: 1842
First Marriage Date: 1864
Death Date: 1903
Spouse: Iram Allen Sawyer
Child: Ellen Nichol Sawyer
(North America, Family Histories, 1500-2000)