Jeanine Guillory Bushnell (granddaughter of Louisa Graham) sent Dottie Batho this wonderful photo of Nathaniel's family.  I'm guessing that it was taken around 1920. 

Front row from left to right: Lily Graham (Nathaniel's daughter), Anne Poole (Agnes's daughter), Dick Gammon (Louisa's son), Nathaniel  Graham, Joan Gammon  (Louisa's daughter), Ellen Graham (Nathaniel's wife), Joyce Gammon (Louisa's daughter), Louisa Graham Gammon (Nathaniel's daughter)

  Back Row left to right: Herbert Poole (Agnes's husband), Agnes Graham Poole (Nathaniel's daughter), Ted Gammon (Louisa's husband)