Karl Haushofer
Whilst in Germany Hamilton had met the geopolitician Albrecht Haushofer, son of the distinguished geopolitical academic Karl Haushofer. The younger Haushofer had studied alongside Hess at Munich University. On Hess's rise to prominence within the Nazi Party, Haushofer became his advisor on foreign affairs. There is speculation that deputy Führer Rudolf Hess communicated with the Duke via Haushofer after the outbreak of war.