Possible Clues:

• Disappear without trace
• Pay vet mostly to turn up, speak and disappear
• Turning to place flags, make a speech and disappear
• The Agency contacts old informer taken in by First Lady to let off steam
• Go poof
• Put down flags, turning to speak, and vanish
• Vanish
• Quietly speak in support of Argentinian lady and disappear
• Create surface cover, set up and talk at length; vanish
• With flag raised, make a speech and disappear