Jurisdiction — Territorial — Over territory in general and persons and property therein — Principle of effectiveness — Distinction between tangible and intangible property — Jurisdiction of courts of place where intangibles transferable or rights thereunder exercisable — Relevance of physical presence of defendant within jurisdiction — Effect of confiscation of intangibles by foreign State — Claim for restitution based on legislation of British authorities in Germany — Extent of jurisdiction of Restitution Court in former British Zone of Germany.