Henry Percy, 9th Earl of Northumberland (d. 1632)
Henry Percy, 9th Earl of Northumberland, KG (27 April 1564 – 5 November 1632) was an English nobleman. He was a grandee and one of the wealthiest peers of the court of Elizabeth I. Under James I, Northumberland was a long-term prisoner in the Tower of London, due to the suspicion that he was complicit in the Gunpowder Plot. He is known for the circles he moved in as well as for his own achievements. He acquired the sobriquet The Wizard Earl (also given to Gerald FitzGerald, 11th Earl of Kildare), from his scientific and alchemical experiments, his passion for cartography, and his large library. His mild deafness and slight speech impediment did not prevent him from becoming an important intellectual and cultural figure of his generation.