Ingrid "Eva" Wilson, born 1847 - Chicago, IL 1880

Dear Listers! This is one of the biggest challenges I have ever encountered, also since this person is a relative of mine… I refer to the 1880 census for 394 State street in Chicago, IL where these people lived as boarders: WILSON, Eva 32 Nor Nor Nor - dressmaker, widowed WILSON, Lilly 9 IL Nor Nor - daughter, at school https://www.familysearch.org/ark:/61903/3:1:33S7-9YYF-S962 There were two sisters in this Oyane ("Owens/Peterson") family who moved from Crawford Co., WI to Chicago, IL, probably in the mid/late 1860’s, since they are no longer living at home in the 1870-census: ** Ingrid, born in Luster Co., Norway Feb. 21, 1847 ** Anna, born in Luster Co., Norway June 21, 1851 The girls are referred to in the probate record for their brother John Henry Owens who died in Yankton, SD Aug. 6, 1924. They were then listed as «Ada BROWN and Mrs. WILSON». The probate court only had a reference saying that Ada Brown was on Lutheran charity in Chicago, IL, while Mrs. Wilson’s whereabouts were unknown. The court informant was a son of an older deceased sister Ingeborg «Emma» SCHUSTER of Creighon, NE (1844-1904). The probate court never found any of them, and the probate case was still open when I studied it in Yankton, SD in 1979! I have identified Ada BROWN - she was by 1900 a «widowed» laundress in Chicago, IL - 49 years old and born Norway in June of 1852(!). She was actually in a common-law union with Samuel H. BROWN, a man «of color», a native of Cincinnati, OH, residing with Anna as a lodger in 1900. Ada died at a retirement home (Lutheran charity) at Norwood Park, IL May 9, 1922. She had no children. I am fairly convinced Ada must be identical to Anna, thus giving us a good «match» for Eva WILSON being Ingrid! Her age is also «perfect»! But what happened to Ingrid "Eva" WILSON and her daughter Lilly??? Where was Eva in 1870 and after 1880? The 1882 Chicago city directory shows one Mrs. Eva Wilson housing on 450 State The 1878 Chicago city directory shows one E. J. Wilson, widow of John, housing on 490 N State The 1878 Chicago city directory shows one Ray B. Wilson, laundry, housing on 417 State Lilly WILSON was in school in 1880 - does anyone have experience with public school records in Chicago, IL from the 1880-time frame? I would be the happiest man on earth if someone can manage to help me locate Ingrid "Eva" WILSON and her daughter Lilly! Thanks a million in advance! Very sincerely yours,