Here is the 1910 US Census for Sigri Gunnersdatter and Lars Olson's eldest son, Lars Jordal.
Lars had moved from Milan township, DeKalb county, Illinois to Willow Creek township, Lee county along with his youngest daughter Mrytle.
The census is dated April 15, 1910 indicating Lars was a widow; his wife Isabelle had passed away sometime earlier that month. The Lee County Genealogical Society has an index for the Dixon Telegraph; her obituary was printed in the April 22, 1910 edition.
Lars still owned property in Milan township, DeKalb county at the time of this census and reviewing the Willow Creek township plat maps I've been unable to locate a Lars Jordal.