I had no luck in locating Sarah Jane Avert(t) in Hancock County in 1900 or 1910, but did find this family in neighboring McDonough County in the 1900 census. Macomb is about 25 miles from Augusta. The birth date for Sarah seems to match and the fact that her mother is a widow living with her parents may explain your difficulty in locating the family. In 1900, Eli P. Hennies ( w, m, b. Mar 1848, age 52, married 32 years, teamster) is living in a rented house at 623 W. Washington Street in Macomb, McDonough County, Illinois, with his wife Nancy (w, f, b. Feb 1848, age 52, g. Feb 1848, married 32 years, gave birth to 5 children, 4 of whom survive), his son William (w, m, b. Dec 1880, age 19, single, day laborer), daughter Minnie Arvette (w, f, b. Apr 1876, age 24, widow, gave birth to 3 children, 2 of whom survive), and granddaughter Sarah E. Arvette (age 7, b. Sept 1892, at school), and grandson Eli Parker Arvette (age 4, b. Nov. 1895). Eli was born in Illinois, his father in Maryland, and his mother in Kentucky. Nancy was born Illinois and her parents in Tennessee. William was born in Iowa, Minnie in Illinois, Sarah in Missouri, and Eli Parker in Illinois. Sarah and Eli's deceased father was born in Vermont. In 1910, Robert C. Graves (age 33, ) is living in Jackson Township, Monroe County, Missouri, with his wife Minnie M., daughter Sylva M. (age 1 year 1 month), and son Eli P. Arvitt (age 14). Robert and Minnie have been married 10 years and it is the second marriage for both. It appears that Minnie remarried and her son by her first marriage is living with them. Sarah is not. I could not locate her. I also did a further search and found two family trees online for an Eli Parker Henness (Minnie¹s father)--one that places him in Augusta, Illinois, at the end of his life. According to this record, Eli Henness was born on 25 Mar 1848 in Urbana, Champaign County, Illinois, to Joshua Lee Henness and Polina Ann Wilson. He died on 21 Dec 1922 in Augusta, Hancock County, Illinois. He married Nancy A. Hanley in 1867. They had four children: Gennie (b. 1869), Minnie May (b. 1873 in Colchester, McDonough County, Illinois), Mary Etta (b. 1878), and John William (b. 1880). http://worldconnect.rootsweb.com/cgi-bin/igm.cgi?op=GET&db=bar469&id=I1197 and http://worldconnect.rootsweb.com/cgi-bin/igm.cgi?op=GET&db=donna70&id=I4747 The 1860 U.S. Census places Eli Henness (age 13) in Lawrenceburg, Squaw Township, Warren County, Iowa, living with his mother Polina J. Henness (age 50) and siblings William (age 21), Deborah J. (age 16), Euseline (age 7), and Angeline (age 4). Polina was born in Kentucky, William, Deborah, and Eli in Indiana, Eusaline in Illinois, and Angeline in Iowa. Some sources believe that Eli was married a second time to Margaret ³Maggie² Beamer. I found a Maggie Henness living in Augusta Township, Hancock County, Illinois in the 1870 census. She was living with several of her siblings. The 1880 U.S. Census places Eli P. Hennis (age 32, teaming) and his family in Indianola, Warren County, Iowa. He is living there with his wife Nancy (age 34), daughters Gennie (age 11) and Minnie (age 7), and Ella (age 3). Eli was born in Illinois, his father in Ohio, and his mother in Kentucky. Nancy and her parents in Tennessee. All three children were born in Illinois. The family is living adjacent to a Phillip Hennis family. Although there are inconsistencies among these records, it seems possible they could be the family you¹re looking for.