1843 Birth:2148 Death certificate lists birth date as 14 February 1843.

1850 U.S. Census:398 Mahala enumerated in the household of her father William Bitler as female, age 7, born in Ohio, in school within the year.

1860 U.S. Census:399 Mahala enumerated in the household of her father William Bitler as female, age 17, born in Ohio, in school within the year.

1870 U.S. Census:400 Mahala enumerated in the household of her father William Bitler as Mahala Donegan, female, age 26, domestic servant, born in Ohio.

1880 U.S. Census:401 Mahala enumerated in the household of her father William Bitler in St. Johns, Auglaize County, Ohio as Hallie, white female, age 36, daughter, divorced, housekeeper, born in Ohio, father born in Pennsylvania, mother born in Pennsylvania.

1893 Marriage:2364 Marriage of John and Mahala Dunbar probably occurred in 1893, based on length of marriage (17 years) indicated in 1910 census enumeration.

1903 Death of Stepmother:842, v. 1, p. 31.,1615 Obituary of step-mother Rosanna Bitler (d. 21 Oct 1903) mentions step-daughter Mrs. J. W. (Hallie) Dunbar of Springfield.

1910 U.S. Census:2364 Mahala enumerated in the household of her husband John W. Dunbar in Springfield City, Clark County, Ohio as a wife, female, white, 68, first marriage, married 17 years, no children, born in Ohio, father born in Pennsylvania, mother born in Pennsylvania, speaks English, no occupation, can read and write.

1913 Death Certificate:2148 Mrs. Mahala Dunbar; place of death, Clark County, Springfield, City Hospital; date of death, 18 November 1913; female, white, widowed; date of birth, 14 February 1843; age 69 years 9 months, 4 days; occupation, at home; born in Ohio; father, Wm. Bitler, born in Ohio; mother, Rebecca Snyder, born in Ohio; informant, J. W. Dunbar, Springfield; place of burial, Ferncliff Cemetery; date of burial, 21 November 1913.