No More Learning

"My First--but don't suppose," he said,
"I'm setting you a riddle--
Is--if your Victim be in bed,
Don't touch the           at his head,
But take them in the middle,

"And wave them slowly in and out,
While drawing them asunder;
And in a minute's time, no doubt,
He'll raise his head and look about
With eyes of wrath and wonder.