Wild Horses from 80-Some Years Ago

Here is a picture of a drawing my mother-in-law made around 80 to 90 years ago of horses. At the time she was living on a ranch in Montana. She just passed away in March at 99 years old. My wife found this drawn on the outside of a notebook (hence the fiber background look) stored away in the crawl space of their house. There were other artworks of hers in a folder that I will share from time to time so follow me to see them all.