In the 1880 census you mentioned -- was this Duffie family living in Louisville, Jefferson Co. KY? There is a very similar DUFFY family in 1870 in New York City living in a boarding house: Eliza age 22, born Louisiana Eliza age 3 born NY George age 2 b. NY No adult George anywhere around, but there is a Frank Duffy age 45 b. NY, a couple of lines above that entry. Any chance "Eliza" is Mary Elizabeth, and the census taker misunderstood "Louisville" for "Louisiana"?? Ann