Frances Greer (1895-1975) and Mary Greer (1889-1993) were sisters who lived near Staunton, Virginia. They were acquainted with the Moses family when Anna Mary Robertson Moses (1860-1961) and her family settled in Staunton in 1887. When the Moses family moved back to New York in 1905, Grandma Moses and daughters-in-law Mary and Dorothy corresponded with the Greers.
Grandma Moses was a self-taught, "modern primitive" painter, who did not start painting until she was seventy-seven years old when arthritis forced her to give up yarn needlework. She initially sold her work at county fairs but became known across the country when Hallmark purchased the rights to reproduce her paintings on greeting cards. At the time of her death at 101, she had painted more than fifteen hundred images.