Related Clues:

• Pub orders
• Gumshoes
• They follow trails
• Hammer and Spade
• Spade and Queen, e.g.
• Private eyes
• Case workers
• Redcaps
• Holmes and Chan, for two
• Sleeping car attendants
• Investigators
• Warshawski and Millhone
• Holmes and Chan, e.g.
• Detectives
• Baggage handlers