My grandfather, great uncle and great aunt. This was in the `1920's. They grew up on a farm in rural Illinois. At one time most farms had a working windmill. As technolgy advanced, the windmill was just farm decor. It is funny how , now in the 2000's, windmills[wind turbines] are sprouting up all over the country. I guess our ancestors knew something that has taken us 100 years to figure out.