Possible Clues:

• Rogues offering key to open parts of the religious buildings
• Jacks in packs
• Dastardly dudes
• Jacks, in cards
• Jacks in packs in churches, by the sound of them
• There are four in the pack but five in the snake
• These rascals get involved with a deal of tricks
• Tricky fellows
• In the pack
• Villains, four in a pack