The Man in Black is a mysterious Madrigal trailing the Clue hunters, mainly Amy Cahill, and Dan Cahill.
The first sighting of the Man was in Grace Cahill's home after she had passed away. When he opened the door he scared Saladin, her cat. The Man met with William McIntyre, saying that even though Grace chose her alternate will, the Man would take care of it. Later, the Man was spotted by Dan watching them with binoculars, and was suspected to committing arson upon Grace's home. The Man was then in Franklin Hall at the Philadelphia Science Museum, spotted by Amy. Later a photo was taken of him by the Lucian branch in Pairs and sent to Irina Spasky. He later watched Amy and Dan escape the Île Saint-Louis on the Pont Louis-Philippe bridge, and Amy saw him again.
Sightings continued of this mysterious tailer in the 39 Clues hunt, next on a returning tunnel tour group in the Salzburg Catacombs. Their tour group passed Amy and Dan pushing deeper in the Catacombs, and the Man in Black was briefly spotted by Amy in the dim light.Edit