International law in general — Relation to municipal law — Revolution — Effects in international law — Effects in municipal law of territory in which revolution took place — Rhodesia — The law of Rhodesia

States as international persons — In general — The beginning of State existence — British colony — Rhodesia — Revolution — Declaration of independence — Determination of the question of legality of the new Government — Whether the previous Constitution annulled — Whether the new Government the de jure government — Whether constitution and legislation introduced by the new Government lawful — Principle determining such questions — Efficacy of the change — Facts material in determining the question of efficacy — Duty of the Court — Authority of the judges — Whether derived from the previous Constitution — Judgments of the Privy Council — Whether binding after the revolution — Conduct of the British Government — Whether amounting to forfeiture of sovereignty — The law of Rhodesia