"Who's there?" came a voice from within.
"Four of the Brethren," answered the youth who had knocked.
"Are you alone?"
"No; we have brought two novices who are anxious to be introduced to the mystic order."
Plunger began to prick up his ears. The mystic order? What mystic order? And what were they going to do with them?
"Two novices who are anxious to be introduced to the mystic order?" came the voice from within. "They wish to become brethren?"
"Yes."
"N—n—no!" came in a gasp from Plunger's lips; but another sharp dig in his ribs reduced him once more to silence.
"Yes, most worthy K. O. P. They are dying to become brethren of the noble band."
"I say, you unkind Beetles," began Harry. "Oh, oh!"