Laura Ingalls Wilder wrote the Little House books, but she was also a prolific writer of magazine and newspaper articles. If you haven't read the Little House books, there's just something BADLY WRONG with you.
In Laura Ingalls Wilder visited her daughter, Rose, in Kansas City, MO. While she was there this studio picture was made. Her life in the Little House books was just a memory and her writing career had not begun.