What types of information are you looking for? There are a fair number of birth, census records (both British and American), passenger list records (both British and American), US-Canadian border crossing records and other records relating to her on Ancestry as well as mentions of her in articles available on Newspapers.com. If you search these websites use both Geraldine Birch (maiden name) and Geraldine Duncan (married name) to find all the relevant results.
Dear Ms. Rodriguez,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located an Alien Case Files, 1944 - 2003 in the Records of U.S. Citizenship and Immigration Services (Record Group 566) that includes the Alien Case File (A-File) for Geraldine Duncan. The file is under her married name. To request a copy of this record, email the National Archives at Kansas City[A] (RM-KC[A]) at Afileskansascity@nara.gov. Requests for this file should include the alien name (Geraldine Duncan), Alien Registration number (A2770495), National Archives Identifier (NAID 158381483), accession number (19-0201), and box number (Box 833).
In addition, we located Manifests of Alien Arrivals in the Seattle, Washington District, 9/1924 - 12/1956 in the Records of the Immigration and Naturalization Service (Record Group 85) that includes a document relating to her 1932 reentry into the United States from an overseas trip. The form provides a number of details about her. To request a copy, please contact the National Archives at Washington, DC - Textual Reference (RDT1) via email at Archives1reference@nara.gov. These records are available on Ancestry as U.S., Border Crossings from Canada to U.S., 1895-1960.
We also located Passenger Lists of Vessels Arriving at San Francisco, 1893-1953 in the Records of the Immigration and Naturalization Service (Record Group 85) that includes a document relating to her 31 October 1935 reentry into the United States from an overseas trip, accompanied by her son Perry Duncan. These records are also located at RDT1. These records are available on Ancestry as California, Passenger and Crew Lists, 1882-1959.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request from RM-KC[A] and RDT1. We apologize for this inconvenience and appreciate your understanding and patience.
We located listings for her in the Population Schedules for the 1920 Census, the Population Schedules for the 1930 Census, and the Population Schedules for the 1940 Census in the Records of the Bureau of the Census (Record Group 29). Each year she is living in Pasadena, Los Angeles County, California, USA. For information about accessing federal census records, see Search Census Records Online and Other Resources.
The records mentioned above as being available through Ancestry may be accessed with a paid subscription. Some libraries provide free access to Ancestry for their patrons. Ancestry also has other records from other institutions relating to Geraldine Rose Birch Duncan under both her maiden name and married name, such as English Census records, UK passenger lists records, California Biographical Index Cards, and others.
We searched online and located three brief biographies of Geraldine Rose Birch Duncan.
We suggest that you contact the Archives of American Art, the California State Library, the Pasadena Society of Artists, and the American Federation of Arts, as well as other organizations referenced in the articles linked above or that otherwise have a California, Pasadena, or art history focus. Additionally, you may wish to review the UCLA Library guide for researching Los Angeles and Southern California art and art history.
For information on researching English birth records see Research your family history using the General Register Office. For information on researching Scottish marriage records see the ScotlandsPeople Centre website. For information about English Census records, see the National Archives of the United Kingdom. For information on researching California divorce and death records, see California Vital Records.
There may be articles about her in newspapers, particularly from the Southern California area. See U.S. Newspaper Directory, 1690-Present for information about locating historical newspapers. Many newspapers are available on various subscription newspaper archive services.
We hope this is helpful. Best of luck with your research!
[Some information provided by Elizabeth Burnes, Subject Matter Expert]