Sir William Clarke was born in London circa 1623. He was admitted to the Inner Temple in 1645 and was called to the bar in 1653. For twelve years he acted as secretary to General George Monck. At the Restoration he was knighted and in 1661 was appointed secretary at war. Clarke accompanied Monck on a naval expedition against the Dutch in 1666. He died after being injured by a cannonball.
From the description of Sir William Clarke manuscripts, 1640-1664 (inclusive), [microform]. (Unknown). WorldCat record id: 122501451