In 1906, Richardson was appointed Professor of Physics atPrinceton University in the United States, a position he held until 1913. The following year, he returned to England to become Wheatstone Professor of Physics atKing's College London, where he was later made Director of Research in 1924. He retired from King's College in 1944.[6]
In 1906, Richardson married Lilian Maud Wilson, the sister of his Cavendish colleague,Harold Albert Wilson. They had two sons and a daughter.
Richardson had two sisters: Elizabeth Mary Dixon Richardson, who married the prominent mathematicianOswald Veblen; and Charlotte Sara Richardson, who married the American physicist (and 1937 Nobel laureate in Physics)Clinton Davisson, who was Richardson's Ph.D. student at Princeton. After Lilian's death in 1945, he was remarried in 1948 to Henriette Rupp, a physicist.
Richardson had a son, Harold Owen Richardson, who specialised in nuclear physics and was also the chairman of the Physics Department at Bedford College, London University, and later on became emeritus professor at London University.[citation needed]
