Pasis: Sasudah parang, Leona Marshall babaliak ka Universitas Chicago, di mano inyo manjadi sasamo di Fermi's Institute for Nuclear Studies. Pado 1960, inyo bagabuang jo Chicago Pile 3 heavy water reactor, inyo manamuan jalan untuak 100 persen spin polarize neutron beams, jo manantukan refractive index neutron untuak babagai bahan. Anak kaduo inyo, John Marshall III, lahia pado 1949. Inyo manjadi asisten profesor pado 1953. Sasudah Fermi maningga pado 1954, Marshalls bapisah. John Marshall babaliak ka Laboratorium Los Alamos, samantaro Leona, nan kini sacaro efektif marupokan surang mandeh, manjadi sasamo di Institute for Advanced Study di Princeton, New Jersey pado 1957.
John Marshall nan III