Who Trimmed the Peacock?

The Peacock is a totally narcissistic animal who can only think of his great beauty. However, he is attacked by a mysterious aggressor who cuts up his tail feathers. The Peacock is disfigured! Who could have done such a thing? Meanwhile, Sherlock has a problem. He'd like to watch the final match of the Worcesteshire cricket tournament. But he also has to lead the investigation.