Dorothy Seger was born September 2, 1895 to Hiram and Sarah Seger. She grew up in Cheboygan, Michigan, but moved to Detroit where she married Leonard H. Pratt on July 4, 1919.

From 1930 to 1960, Dorothy worked as a clerk in the Detroit Public Library. She was a member of Dunning Park Chapel.

Leonard died December 26, 1934 leaving Dorothy with three children under 15 years of age. Dorothy died in September 21, 1980 in Battle Creek, Michigan as she was visiting her daughter from her home in Redford. She is survived by her three children, and grandchildren.