In 1910, Mary Sanderson, husband Seward and children Stanley (not sure why he wasn't listed as living with his parents on the 1900 census) Lawrence, Elmer, Walter, Anna, Lillian and Violet.
Again, as you can see, the census records are not 100% accurate. They indicate Mary had 8 children, 6 were living as of the 1910 census, though 7 children resided with Mary and Seward. It's a guess where the error would be and makes tracing your genealogy very tedious and difficult.
The Sanderson family was still living in Milan Township, DeKalb County, Illinois.