"I wish we had more help!" exclaimed Andy. "We're likely to have trouble soon! Why don't those boys come up; in a few minutes they won't have a chance!"
Indeed it would have been risky now for Jack and Mark to venture out from under the ship, where they were still bravely chipping at the last remaining bit of ice that help the ship fast. So far their presence had not been noted by the enemy.
At that instant Professor Henderson ran out of the engine room.
"Use the machine gun!" he yelled. "That is our only hope!"
The next second he fell to the deck, struck by a spear.
CHAPTER XXIX
THE ESCAPE
"He's killed!" cried Andy.
"Oh Perfessor! Perfessor!" exclaimed Washington. "I tole yo' not to go out."
"Never mind! Start the machine gun!" yelled Andy. "We must fight off these human fiends!"