Here is the 1870 US Census for the remaining children of Olive (Jacobs) and Henry Emery:
William Patrick Emery, John F Emery, Jason Rust Emery, and Elizabeth (Emery) Butler all living in Highland township, Wapello county, Iowa.
William Patrick Emery was living with wife Margaret and their children, Henry, Mary and Frank. John F Emery was living next door with wife Phebe and their children Ida and Lottie. Next to John was sister Elizabeth Butler living with her husband Abia and their children, Ella, Alice Eva and Frank. Jason Rust Emery apparently was nicknamed "Doc" and was living two houses away from Elizabeth.
I had posted the census for their brother, David W Emery, my great great great grandfather last year as well as my great great great great grandfather Henry Emery and his second wife, Hannah (Gaffney). I did not know it at the time but Henry and Hannah were living next door to Henry's youngest daughter, Catherine Kelly and her husband William.