Thanks you.In the 1900 Wisconsin census it looks like Anna Hutter had only one child. This was just sent me in answer to aWisconsin query.
Déclarations de Citoyenneté, Alsace-Lorraine, 1872 (Collection des Optants) Alsace-Lorraine, France Citizenship Declarations (Optants), 1872 Name:Anna Hutter (nee Eschenbrenner) Birth Date:1836 Birthplace:Rahling Age:36
Do you have access to immigration records? On the census both Mary and her mother state 1875 as their immigration year. I have tried to find them on Ancestry with no luck. Thanks again - sometimes just knowing what is not is a good clue.