Possible Clues:

• Having broken the desk gets one bad enough to make oneself scarce
• Run off or leave swiftly
• If the desk is broken, that's bad. Make yourself scarce
• Broken the desk? That's bad to make it like that. Make yourself scarce
• Fly, fly when riding horse?
• The broken desk - that's bad. Better make yourself scarce
• Scarper
• Scarper, seeing King Edward on horseback
• Scurry off
• Having broken desk, go off to get bolt