War — Effects of — On Private Enemy Property — The Practice of the United States — Trading with the Enemy Act, 1917 — Effects of — Whether Divesting Enemy Aliens of their Property — Seizure of Enemy Property — Whether Amounting to Confiscation — Intention to Reimburse Alien Enemies — Whether Amounting to Renunciation of the Right of Confiscation — United States Settlement of War Claims Act of 1928 — How Far Conferring a Vested Right upon Former Alien Enemies.