According to the 1900 Census, her parents were both born in New Jersey.
John Miller and Samantha are listed in the 1870 Census for Carlston, Freeborn County, MN. Samantha's mother, Laura (Read) Woodward Powers, is living with her.
Laura Jane and her family are found in the 1880 Census for Fulton, Webster County, Iowa. Her mother, Laura (Read) Woodward Powers, is living with them.
I think the age might be incorrect and this is Eunice R. Churchill.