On December 25, 1883, Bradley was born as Sue Worthington Cox in Baltimore, Maryland.
Bradley's mother was Elizabeth Janney (nee Merrefield) Cox (1850-1926).
Bradley and her family lived in places including Long Beach, California and Guam.
[3][9][4] In Guam, Bradley and her family lived in the ancient Spanish Governor's Palace.
Bradley is interred at Fort Rosecrans National Cemetery in San Diego, California.