With only the Census to go by I would say that Sylvia is the daughter of George Fiske and Ellen Fearn. George is the son of Alexander Seabury Fiske and Mary E. Brownell.
To be 100% sure you will need to get copies of Birth records and such but I feel confident that these ties are accurate.
I have the rest of the ancestry for Sylvia going back to William Fiske of Fressingfield, Suffolk Co. England in the 16th century.
That'll be $50.
Ok it was free but I love saying that. Take care, Bob P.S. You can email me if you want the whole ancestry but as I say only birth, marriage and death records can guarantee the accuracy of the research I just did but at least I found you a place to look for them.