Dear Ms. Salva,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located the Population Schedules for the 1870 Census in the Records of the Bureau of the Census (Record Group 29) that may contain records of Joséphine Joncières. For access to the non-digitized schedules, please contact the National Archives at Washington, DC - Textual Reference (RDT1) via email at firstname.lastname@example.org.
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 RDT1. We apologize for this inconvenience and appreciate your understanding and patience.
For information about the U.S. Census, see the Census Bureau technical documentation and questionnaires.
You may wish to search Ancestry.com or FamilySearch.org for the U.S. Census. There may be a fee for using Ancestry. Instead, check for access at your local library as many library systems subscribe to these sites, making them free for their patrons.
We suggest that you contact the California State Archives, the California Genealogical Society and the Archives of the Archdiocese of San Francisco for a record search. We also suggest that you search the Chronicling America: Historic American Newspapers for possible information about Joséphine Joncières. In addition, the FamilySeach research wiki for California Vital Records may be helpful.
We hope this is helpful. Best of luck with your research!
Many thanks Cara for your kind help.
Happy new year !