Here is the 1930 US Census for Ole and Mari Finnestad's great grandson, Walter Sanderson.
By 1930, Walter had moved away from his parent's home in Milan township, DeKalb County, Illinois and was living with his wife Mildred (Lindaas) and their two daughters, Donna and Wilma in South Grove township in DeKalb County, Illinois. The Sanderson family also had a hired hand, Clayton Verdeaux living at their home.
Walter was the son of Ellen Marie (Vallem) and Seward Sanderson and the grandson of Rachel (Finnestad) and Lewis Vallem.
Walter and Mildred's first two children, Walter Orlando and Mildred Jean both passed away prior to the 1930 census. Walter was born in 1925 and died the same year. He was buried at the Union Cemetery in Lee County, Illinois. Mildred was born in 1926 and died the same year.