Silver Revolution started by

Explanation: Henry John Temple, 3rd Viscount Palmerston was a British statesman who served twice as a Prime Minister in the mid-19th century. Palmerston dominated British foreign policy during the period 1830 to 1865 when Britain was at the height of its imperial power. He held office almost continuously from 1807 until his death in 1865.

Explanation: For an initial 15 years, the charter granted the company a monopoly on trade with India's east and west coasts.

Explanation: A constellation is an area on the celestial sphere in which a group of visible stars forms a perceived pattern or outline.