Comity — Mutual judicial assistance — Limits of assistance — Attempt to enforce foreign revenue laws in bankruptcy proceedings — Whether contrary to international law — Belgium — United Kingdom Convention respecting Legal Proceedings in Civil and Commercial Matters, 1922

Jurisdiction — Extraterritorial — Presumption against extraterritorial application of legislation — Power to require person to appear in English court for examination in bankruptcy proceedings — Whether applicable to British citizen resident in Belgium — Whether power to compel such person to submit to examination either in England or in Belgium

Relationship of international law and municipal law — Treaties — Whether English court has jurisdiction to construe treaty — The law of England