A. This may be Lydia and dau Sarah on the 1880 census. It would be more consistent with dieing in 1888 at age 82 (born 1806). Dau Sarah supposedly married a Mr. Stewart (and had no children) but she is listed on this census entry as "S"(ingle). Needs further research.

Lydia POE Self W Female W 73 PA Keeping House GER PA
Sarah POE Dau S Female W 39 PA PA PA

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Source Information:
Census Place Greene, Beaver, Pennsylvania
Family History Library Film 1255097
NA Film Number T9-1097
Page Number 212A