When Mary Agnes Laidlaw was born on 4 November 1915, in Pasadena, Los Angeles, California, United States, her father, David Victor Laidlaw, was 28 and her mother, Agnes Mary Smith, was 35. She married Thomas Hall Downs on 19 May 1940, in Los Angeles, Los Angeles, California, United States. She lived in Pasadena Judicial Township, Los Angeles, California, United States in 1940. She died on 2 December 2002, in Grants Pass, Josephine, Oregon, United States, at the age of 87, and was buried in Glendale, Los Angeles, California, United States.