Calvin H. Barnum, born abt 1836 in Newstead, Erie, New York, and later immigrated to Michigan. He married Eveline Jennings, who was born about 1842/43 in Groveland, Oakland, Michigan. Eveline was the daughter of Joseph Jennings, b. abt. 1808 in New York and Charlotte Husted, b. abt. 1818 in New York. Joseph and Charlotte were married on 19 April 1857 in Groveland, Oakland, Michigan.
1860 United States Federal Census about Calvin H Barnum. Name: Calvin H Barnum; Age in 1860: 24; Birth Year: abt 1836; Birthplace: New York; Home in 1860: Groveland, Oakland, Michigan; Gender: Male; Post Office: Stony Run; Occupation: Farm laborer; Value of real estate: $1,000; Household Members: Truman Husted, 49; Evelina Husted; 54; Jennett Husted; 15; Calvin H Barnum, 24.
1870 United States Federal Census about Calvin Barnum. Name: Calvin Barnum; Estimated Birth Year: abt 1830; Age in 1870: 40; Birthplace: New York; Home in 1870: Montrose, Genesee, Michigan; Race: White; Gender: Male; Occupation: Farm labor; Value of real estate: $300; Value of personal property: $100; Post Office: Mount Morris; Household Members: Calvin Barnum, 40; Eveline Barnum, 38; Emerson Barnum, 7; Cora Barnum, 5; Josie Barnum, 1 [Note: the ages given for Calvin and Eveline are obviously incorrect; they would have been 34 and 28].
1880 United States Federal Census about Calvin Barnum. Name: Calvin Barnum; Home in 1880: Montrose, Genesee, Michigan; Age: 44; Estimated Birth Year: abt 1836; Birthplace: New York; Relation to Head of Household: Self (Head); Spouse's Name: Evaline; Father's birthplace: New York; Mother's birthplace: New York; Occupation: Farming; Marital Status: Married; Race: White; Gender: Male; Household Members: Calvin Barnum, 44; Evaline Barnum, 38; Emerson Barnum, 17; Joseph E. Barnum, 11; Ada D. Barnum, 8; Ida M. Barnum, 6; Clara E. Barnum, 2.