I crept behind It, and gave it my k

I crept behind It, and gave it my knife, but the knife went through It, empty as the air." And as he spoke he took the knife and drove it savagely into space. Then he went on, "But It is here, and I'll find It. It is in the hold, perhaps in one of those boxes. I'll unscrew them one by one and see. You work the helm." And with a warning look and his finger on his lip, he went below. There was springing up a choppy wind, and I could not leave the helm.