moon behind the clouds shone on the expanse of white planes, and on the fish-tail rudder, one of Tom's latest ideas.
"Hey, there!" cried Tom, warningly.
"Leave that alone!" yelled Ned.
"Koku! Koku!" shouted Tom, shrilly. "Get after those fellows!"
"Me get!" boomed out the giant, in his deep voice.
He had been standing near the entrance to the hangar, probably waiting for developments, and watching for the arrival of Tom and Ned. The big form was seen to leap forward, and then several dark shadows swarmed from around the airship, and were seen to fling themselves upon the giant.
"That's a fight!" cried Ned. "They're attacking him!"
"Koku can take care of himself!" murmured Tom. "But come on. I don't see what their game is."
He understood a moment later, however, for while several of the midnight visitors were engaged in a hand-to-hand tussle with the giant there came a sharp, throbbing roar of the airship motor in motion. The propellers were being whirled rapidly about.
"Koku! Koku!" cried Tom, for he was
