"Accused me of defamation of character by means of caricature." Charlie grinned. He sharpened his voice into a shrill soprano. "I've seen you sitting there drawing away. I know you did it. And you deliberatly left it for me to find. all I had to do was dig through the bin and flatten it out."
He picked up and unfolded the paper - a napkin - to show a sketch of a witch - her hat adorned with horns.