I am still trying to put the pieces together on Ruth Mary. I have her in the household of Joseph Buchele living in Salem Ward 1, Marion, Oregon 1910 census. He was 25, She 25 born Michigan, (father Wisconsin and mother Canada and a child age 2 Syliva born Illinois. Later I have Syliva married to Clyde Antisdel in Berrien, Michigan age 21 (Michigan county Marriages 1820-1935).
I do not have birth or death certificates to prove the above only my searches. The obit for my great grandfather John B. Jarvis (Gervais) states that he had one brother living in Minnesota and a sister living in Oregon. It does match my searches, but as I said I have no positive documents. I have been in contact with my great uncles family in Minnesota (Louis Jarvis) and they too are confused as to who Matilda Jarvis-Wiltsey is. With hopes she is the mother of Ruth Mary and sister to my John.
Please let me know if this helps and if you have confirmed more than I have.