At length he fell into a fitful doze, and he had a wild dream that he was sliding down hill on a big mirror in which all sorts of reflections were seen--reflections that he could not get to show in the selenium plates.
Then Tom felt the mirror bobbing up and down like a motor boat in a storm. He felt the vibration, and he heard a voice calling in his ear:
"Get up, Tom! Get up!"
"Yes! What is it?" he sleepily exclaimed,
"Hush!" was the caution he heard, and then he realized that his dream had been caused by Ned shaking him.
"Well?" whispered Tom, in tense tones.
"Midnight visitors!" answered his chum "The burglar alarm has just gone off! The airship hangar drop fell. Koku has gone out. Come on!"
Chapter XI The Airship Is Taken
Tom leaped silently out of bed, and stood for a moment half dazed, so soundly had he been sleeping.