I’m not related to any member of this family.
1940 is the last available census at this time.
There is a 20 yr. gap in the census records 1880 - 1900.
The sisters in question probably married.
WISC. Vital Records -
Registration of Wisconsin Vital Records (birth, death, marriage and divorce certificates) was mandated on October 1, 1907. Some records back to the mid to late 1800’s.
Wisconsin does not, and has no plans to, publish vital records information on the Internet. Since Vital Records contain legally identifiable information, we want to protect the privacy of our citizens.