"We'll do it!" declared Tom.
"Bless my stars! They've gone!" suddenly exclaimed Mr. Damon. "They've disappeared, Tom, I can't see them."
It was indeed true. Those in the pilot house peering ahead through the darkness, could not get a glimpse of the airship they were pursuing. The beam of the searchlight showed nothing but a black void.
All at once the beam shifted downward, and then it picked up the white-winged craft.
"They went down!" cried Tom. "They tried to drop out of sight"
"Can't you get them?" asked Mr. Whitford.
"Oh, yes, we can play that game too. I'll do a little volplaning myself," and the young inventor shut off the power and coasted earthward, while Ned, who had picked up the forward craft, kept the searchlight playing on her.
And now began a wonderful chase. The smugglers' craft, for such she proved later to be, did her best to dodge the Falcon. Those managing the mechanism of the fleeing airship must have been experts, to hold out as they did against Tom Swift, but they had this advantage, that their craft was much lighter, and more powerfully engined as regards her weight. Then, too, there were not so many on board, and Tom, hav-
