I have found one of your missing ones. They were found by looking for Maria Ritchie, 1920 census, Dinwiddie. I found Bessie Morton(21), married to a Junius Walker. In the household are a sister-in-law and brother-in-law, and what appears to be a mother-in law. The census page I'm looking at, the hand writing is not good.
Maria is listed as grandmother-in-law.
1920 census, ED-24, Pg-2A, Dinwiddie Co., Va.
1940 census, you find in Dinwiddie, Bessie and Junius, with children Joseph-17, Annie Mae-14, William-9, Lakey-8, Gladys-4, and Bessie K.-1
They are living in rural Dinwiddie, Rt-626.