Possible Clues:

• A riverside scavenger of Victorian times
• Birdlike term for a river scavenger
• One who scavenges in tidal rivers
• Dirty bird?
• Urchin lad wandering in gloom
• One scavenging beside river
• Rascally lad in the shadows?
• Scavenger left ancient vessel after damaging allegations
• One searching at low tide for a bird
• Scavenger