It looks like this couple is in the United States Census in Philadelphia in 1910, 1920, 1930 and 1940. Robert Bird's wife Nellie appears to have the maiden last name of Jerdan. On the death certificate of Robert and Nellie's daughter, Nellie, it shows her mother's name as Nellie L. S. Jerdan. The father is shown as Robert Bird. The daughter unfortunately died at age 4 in Philadelphia.