Likely the 64 year old tailoress in Grafton in 1870 census.
Possibly died intestate in 1880: Rensselaer Probate Records, Vol 093, 1879-1881
Ancestry.com. New York, Wills and Probate Records, 1659-1999 Image 246.
No FaG for a Sarah who died in 1880, Wager or Wagar
There is a 91 year old Sarah Wager patient at the Utica State Hospital in the 1900 census.