On the back reads "Grandma Niederjohn" Then later someone wrote "Hattie Stratman's" above Grandma Niederjohn. Hilda Niederjohn is Hattie's mother. Yet her name would have changed to Mumm around 1905. Hattie's Stratman's Grandma Niederjohn would be Anna, she died in 1899. She could be the person in this picture.