International law in general — Relation to municipal law — Treaties — Extradition treaty — Interpretation in municipal courts Relation to municipal statute on extradition — The law of England

Treaties — Conclusion and operation of treaties — Operation and enforcement — Relation of treaties to municipal law — Extradition treaty — Interpretation in municipal courts — Relation to municipal Extradition Act — The law of England

Treaties — Interpretation — Principles and rules of interpretation — Context — Subsequent practice — Relation to municipal statute — Interpretation in municipal courts — Extradition treaty — The law of England

The individual in international law — Extradition — Procedure of extradition — Extradition Agreement between the United Kingdom and the Federal Republic of Germany — Relationship between Agreement and Extradition Act 1870 — Production of evidence — Time limit contained in Agreement — Whether running from date of fugitive's arrest on provisional warrant — Provisional warrant procedure appearing in Act but not in Agreement — Whether evidence to be produced to court or to Foreign Office within time limit — Treaty interpretation — Importance of subsequent practice of parties — Importance of treaty provisions as a whole — The law of England