When Mary Lambert was born on 20 February 1846, in Topeka, Mason, Illinois, United States, her father, David Lambert, was 30 and her mother, Cyrena Michels, was 23. She had at least 5 sons and 9 daughters with Booker May Harris. She lived in Franklin Township, Newton, Missouri, United States for about 20 years. She died on 7 December 1915, in Fairview, Newton, Missouri, United States, at the age of 69, and was buried in Dice Cemetery, Franklin Township, Newton, Missouri, United States.