Possible Clues:

• Mistake concerning part of gun
• Management blunder created complete spectacle
• Blunder of six deliveries location reported
• Groan, consumed by obvious lapse
• Inadvertent mistake as regards vision
• Error in commentator’s position on left
• Act of omission ... or of a commission
• Lapse during the hours of darkness -- change of direction taking place inside
• Watchful care ... or careless mistake
• Slip-up on particular area in speech