I've been working on the Immaculate Conception cemetery (St. Anna parish) interment records. Katarzyna Szymura died Nov 1906 and her husband Jan died Feb 1909. They had 6 known children: Mary, Frank, Catharina, Veronica, Agnes and Ludwig (all born 1889-1899 in Poland, Iowa or Minnesota).
I haven't been able find any of the children after their father died. The two oldest Mary and Frank would have been old enough to take care of the minor children, but I can't find any of them on the 1910 census anywhere in MN.
Any ideas? I've searched familysearch and ancestry with no luck so far. Also searched MOMS for marriage records, no luck there either.