When Mildred Emily Vannice was born on 20 October 1904, in Prosser, Benton, Washington, United States, her father, Robert Latta Vannice, was 28 and her mother, Emmaline Lucinda Merrick, was 22. She married Claude Ellsworth Black on 7 March 1928, in Pomeroy, Garfield, Washington, United States. They were the parents of at least 1 son and 2 daughters. She lived in Walla Walla, Washington, United States in 1920. She died on 1 April 1977, in Dayton, Columbia, Washington, United States, at the age of 72, and was buried in Dayton, Columbia, Washington, United States.