Galileo was but eighteen when he saw the principle of the pendulum in the swinging lamp in the cathedral at Pisa.

Peel was in Parliament at twenty-one.

Gladstone was in Parliament before he was twenty-two, and at twenty-four he was a Lord of the Treasury.

Elizabeth Barrett Browning was proficient in Greek and Latin at twelve; De Quincey at eleven.

Robert Browning wrote at eleven poetry of no mean order.
Cowley, who sleeps in Westminster Abbey, published a volume of poems at fifteen.