1900 United States Federal Census Oxford, Hamlin, South Dakota
Robert Ackman: Head of Household, Age: 40, Birthdate: Dec. 1859, Birth Place: Illinois, Marriage Yr: 1886
Salie Ackman: Wife,Age: 30, Birthdate: Dec. 1869, Birthplace: Kentucky, Marriage Yr: 1886
Raymond Ackman: Son, Age: 13, Birthdate: Mar. 1887, Birthplace: Kentucky,
Charley Ackman: Son, Age: 11, Birthdate: Jan. 1889, Birthplace: Illinois
Carl Ackman: Son, Age: 6, Birthdate: Jul. 1893, Birthplace: Illinois
Estel Ackman: Son, Age: 1, Birthdate: Oct. 1898, Birthplace: Illinois

1930 United States Census Brookings, Brookings, South Dakota
Carl Ackman: Head of Household, Age: 37
Lilah Ackman: Wife, Age: 39, Birthdate: abt 1891, Birthplace: South Dakota
Jean F. Ackman: Daughter, Age: 9, Birthdate: abt. 1921, Birthplace: South Dakota
June A. Ackman: Daughter, Age: 6, Birthdate: abt. 1924, Birthplace: South Dakota

1940 United States Federal Census Rushville, Schuyler, Illinois
R M Ackman: Head of household, Age: 80, Birthdate: abt. 1860, Birtplace: Illinois, Marriage Status: Widowed
Nettie Ackman: Wife of Raymond Ackman, Age: 43, Birthdate: abt. 1897, Birthplace: South Dakota
Robert Ackman:Son of Raymond & Nettie Ackman: Age: 19, Birthdate: abt. 1921, Birthplace: South Dakota
Raymond Ackman: Son of R M Ackman, Husband of Nettie Ackman & father of Robert Ackman, Birthdate: abt. 1887, Birthplace: Kentucky

Illinois Deaths and Stillbirths Index
Name: Robert M. Ackman,Birthdate:13 Dec.1859
Birthplace: Near Rushville, Illinois
Death Date: 4 Oct. 1942
Deathplace:Rushville, Schuyler, Illinois
Burial Date: 6 Oct. 1943
Cemetery Name:Rushville
Death Age: 83
Occupation: Mail Carrier
Marital Status: Widowed
Residence: Rushville, Schuyler
Father Name: Isaac Ackman
Father's Birthplace: Kentucky
Mother Name: Nancey Harmon
Mother's Birthplace: Kentucky
Spouse Name: Sarah Ackman