"It couldn't be that, Joe."
"Nor it ain't 'geranium' neither--leastways, there's no tail to the G."
"'Cranium,' perhaps," suggested Peter. "The back of the skull."
"That'll be it," said Kirk. "That's where it is, anyhow, never mind what the doctor calls it."
"Yes, sir. 'A little above and behind the left ear, the apparent direction of the blow being from behind downwards. An extensive fracture----'"
"Hullo!" said Peter. "On the left, from behind downwards. That looks like another of our old friends."
"The left-handed criminal," said Harriet.
"Yes. It's surprising how often you get them in detective fiction. A sort of sinister twist running right through the character."
"It might be a back-handed blow."
"Not likely. Who goes about swotting people left-handed? Unless the local tenni
