"Iowa State Census, 1885," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:HHWJ-HT2 : 11 March 2018), Melissa Fiscus in household of Adam Fiscus, Douglas, Audubon, Iowa; citing p. 8, 1885, State Historical Society, Des Moines; FHL microfilm 1,021,320.
"Iowa State Census, 1895," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VT3J-882 : 12 March 2018), Anna Fiscus in household of Martin Rasmussen, Audubon, Iowa, United States; citing p. 85, 1895, State Historical Society, Des Moines; FHL microfilm 1,021,710.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MMG6-HN7 : accessed 19 August 2018), Anna Fiscus in household of Kanes Fiscus, Simpson Township, Dewey, Oklahoma Territory, United States; citing enumeration district (ED) 47, sheet 8B, family 208, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,337.
Malissa Ann Fiscus (1883-1901) on Find A Grave: Memorial #96515356 retrieved 19 August 2018
It may be possible to confirm family relationships with Anna by comparing test results with other carriers of her ancestors' mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Anna: