Arthur Griffith was the founding father of Sinn Féin. With de Valera, he led the first Dáil and was sent to London with Michael Collins to negotiate the Anglo-Irish Treaty which he believed was the right deal for Ireland. He had faith that the Boundary Commission would deliver parts of Fermanagh, Tyrone, Armagh and Down into Free State control. This never happened. Griffith died suddenly in 1922 from a brain haemorrhage.