Olivier Levasseur (1688, 1689, or 1690 – 7 July 1730), was a pirate, nicknamed La Buse ("The Buzzard") or La Bouche ("The Mouth") in his early days, called thus because of the speed and ruthlessness with which he always attacked his enemies. He is also known for allegedly hiding one of the biggest treasures in pirate history, estimated at over £1 billion, and leaving a cryptogram behind with its whereabouts.
Born at Calais during the Nine Years' War (1688–97) to a wealthy bourgeois family, he became a naval officer after receiving an excellent education. During the War of the Spanish Succession (1701–1714), he procured a Letter of Marque from king Louis XIV and became a privateer for the French crown. When the war ended he was ordered to return home with his ship, but instead joined the Benjamin Hornigold pirate company in 1716. Levasseur proved himself a good leader and shipmate, although he already had a scar across one eye limiting his sight.
After a year of successful looting, the Hornigold party split, Levasseur partnering briefly with Samuel Bellamy before deciding to try his luck on the West African coast. After William Moody was ejected from command by his disgruntled crew in late 1718, they elected Levasseur as Captain in Moody's place. In 1719 he operated together with Howell Davis and Thomas Cocklyn (who had also served under Moody) for a time. In 1720, they attacked the slaver port of Ouidah, which was part of the Kingdom of Whydah at the time and is on the coast of what is now Benin, reducing the local fortress to ruins. Later that year, he was shipwrecked in the Mozambique Channel and stranded on the island of Anjouan, one of the Comores. His bad eye had become completely blind by now so he started wearing an eyepatch.