"Is this a roughly accurate plan of the city?" he asked Aga.
She inclined her lovely head.
"And this," indicating the cross, "is the spot where the Quabos will break in?"
Again she nodded, shuddering.
"Then tell me what you think of this," said the Professor.
And he proceeded to sketch out a plan so simple, and yet so seemingly efficient, that the rest of us gazed at him with wordless admiration.
"My friend, my friend," whispered Aga at last, "thou hast saved us. Thou art the guardian hero of Zyobor—"
"Not too fast, Your Highness," interrupted the Professor with his frosty smile. "I shall be much surprised if this little scheme actually saves the city. We may find the rock so thick there that our task is hopeless—though I imagine the Quabos picked a thin section for help in their own plans."
A vague look came into his eyes.