Possible Clues:

• Disinclined to talk of note found in new centre
• Disinclined to speak
• Secretive about explosive used to capture diamonds
• Restrained
• Reserved, shy
• Late, perhaps holding it back?
• Modest collection of two notes and a coin?
• Brett, Nick and René all discovered time is backward
• Reserved lease covering quote rejected
• Modest about a bit of money (note being pocketed)