I was very curious about this article as my family also possesses the obituary notice on Jacob Benedict Stadtfeld, Sr. I too am a great-great granddaughter of this man, but my great grandfather was Jacob Benedict ,Jr.. He was an older brother of Helen Stadtfeld, who was married to Mathias Gray. I have some information on your side of the family, but nothing beyond the names of their children.
My brother and his family still live in San Francisco, but I live in Nevada.