Her most famous novel, Miss Selma Lue, typifies her style of the excessive optimism associated with the Pollyanna school.
Some of her work developed from her devotion to woman suffrage, a cause she helped to win in Tennessee. Daviess was a charter member of the Nashville woman suffrage organization and founded the Madison organization after moving to Sweetbriar farm in 1915. She was living at her home in Madison when she wrote her autobiography, Seven Times Seven (1923). At the time, Daviess was fighting severe articular rheumatism. She died as a result of the disease in 1924.