Misc: What was defined by law as precisely 4840 square yards in 1305?

Questions

In 1814 1st abdication of Napoleon; he is exiled to?

In 1875 Heinrich ---------- discoverer of 11-year sunspot cycle, dies?

In 1898 President ---------- asks for Spanish-American War declaration?

In 1899 Treaty of Paris ratifies; Spain cedes ---------- to US?

In 1906 James A ---------- circus showman (Barnum & Bailey), dies at 58?