In the sixteenth and seventeenth centuries, a court musician had access to the private chambers of royalty, diplomats and other dignitaries both at home and abroad, and therefore was a prime candidate for the secret intelligence service of monarch and realm. This course will surveil the double careers of John Dowland (1563-1626), Thomas Morley (1557-1602), Alfonso Ferrabosco the Elder (1543-1588), Peter Phillips (1560-1628) and one of Cavalli's opera singers, Atto Melani (1626-1714), and others, while exploring the wider musical worlds in which they played their double roles of musician and spy.