Christopher DuffinLondon, England Sir Walter Raleigh (1552–1618; Fig. 1) was a prominent character in Elizabethan England. A one-time favorite of the Queen, he led a rich and varied life as an adventurer and explorer, statesman, soldier, and author. Less well-known is his interest in alchemy and medicine. In 1591, Raleigh married one of the Queen’s…