I was at the records department for Sonoma County today.I found this on Sarah Fay:
Sarah L. Fay – Death RecordReel 9/Image 626
Died at County Hosp. Res: 426 Orchard Street, Santa Rosa, CA Sex: F Race: W Widowed DOB12/16/1848 A: 84y 3mo 20ds Occupation: Housewife POB: Missouri F: Elliot Bland POB: Virginia M: Virginia ClayPOB:Tenn In CA 57 yrs Inf:Mrs. C.B. Fay, 428 S. A street, Santa Rosa, CA Burial Santa Rosa 4/7/33 DOD: April 5, 193311:45am Ceberal Hemmorage No autopsy
I don't know if this is the right Sarah Fay but if so it doesn't look like she was an unknown child.Hope this helps!