The Second DÃ il 's members were elected in the 1921 elections for the Parliaments of Northern Ireland and Southern Ireland ; the Third DÃ il was elected in 1922 as the provisional parliament of Southern Ireland , as provided for by the Anglo-Irish Treaty . The Second DÃ il comprised members returned in the 1921 elections for the Parliaments of Northern Ireland and Southern Ireland ; the Third DÃ il was elected in 1922 general election as the `` provisional parliament '' of `` Southern Ireland '' , as provided for by the Anglo-Irish Treaty .