When Mary Campbell Gibson was born on 7 November 1892, in Pennsylvania, United States, her father, John Henry Gibson, was 36 and her mother, Louise Henshey, was 34. She married Thomas Eldridge Bishop in February 1914, in Petersburg, Virginia, United States. They were the parents of at least 3 daughters. She lived in Tyrone, Blair, Pennsylvania, United States in 1900 and Lochleven Magisterial District, Lunenburg, Virginia, United States in 1930. She died on 31 May 1969, in Lunenburg, Virginia, United States, at the age of 76, and was buried in Kenbridge Heights Cemetery, Kenbridge, Lunenburg, Virginia, United States.