Drawing on new evidence from Tudor poetry in Welsh, a quest for PIERS GRIFFITH, pirate-poet (1568 - 1628) lord of the manor of Penrhyn and descendant of the Welsh Princes, an Elizabethan courtier and Merchant Adventurer who led a double life on Her Majesty's Secret Service in the fledgling MI5/6 network of Sir Francis Walsingham, Spymaster.