The 1900 Census says Susan was born March 1845 in Indiana.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M3P8-FGM : accessed 22 August 2018), Susan Lasalle in household of Mitchel Lasalle, Justice Precinct 8 Lincoln town, Lee, Texas, United States; citing enumeration district (ED) 63, sheet 10B, family 333, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,654.
There was a Susan Bills the Female Orphan Asylum in Baton Rouge, Louisiana in 1860, born 1844 in Indiana:
"United States Census, 1860", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MFPF-XYY : 14 December 2017), Susan Bills in entry for Sarah Wood, 1860.