During Eamon de Valera's visit to the United States in 1919, Hamill introduced a resolution in the House of Representatives calling on President Wilson to refuse to receive Auckland Geddes as Ambassador of both Britain and Ireland, but to receive Dr, Patrick McCartan, who had been sent by the Provisional government of Ireland as the Irish ambassador.
In 1919 during Eamon de Valera's visit to the United States, Hamill proposed a resolution in the House of Representatives asking President Wilson not to receive Auckland Geddes as Ambassador from both Britain and Ireland but instead to accept Dr. Patrick McCartan, who was sent by the Provisional government of Ireland.