I looked at this again because my sister wanted to join the Society of California Pioneers. The application required submission of a family tree, with the membership requirement that an ancestor have been in California prior to January 1, 1850. This requirement disqualified Henry Schwerin, because although some of his brothers arrived in 1849, he didn't arrive in San Francisco until January 1850. He missed the Society's deadline by a month. So that sends us back to our dad's side of the family, and the mystery of when my great great grandparents arrived in L.A.