And she walked across to Wilfred, kicked him out of his chair and caught his feet in her hands.
Say this after me!' she screamed, Seven threes are twenty-one! Seven threes are twenty-one!' Just then, Nigel jumped up and and pointed at the blackboard.
"The chalk!" he shouted.
"Look at the chalk! It's moving and nobody is holding it!"
Everybody looked at the blackboard.
And it was true! A piece of chalk was moving across it.
"It's writing something!' screamed Nigel And it was.
Agatha"Who's doing it?" shouted Miss Trunchbull, when she saw her name.
She dropped Wilfred on his head.
Agatha, this Magnus the chalk continued to write.