“Dat’s all right, Massa Tom.  I doan’t laik dem smugger-fellers, nohow.  Good-bye an’ good luck!”

“Bless my grab bag!” gasped Mr. Damon.  “You certainly do things, Tom.”

“That’s the only way to get things done,” replied the young inventor.  “How about you, Ned?  Motor all right?”

“Sure.”

“Then let her go!”

A moment later Ned had started the machinery, and Tom, in the pilot house, had pulled the lever of the elevating rudder.  Whizzing along, but making scarcely any sound, the noiseless airship mounted upward, and was off on her flight to capture the men who were cheating Uncle Sam.

“What are you going to do first, when you get there, Tom?” asked Ned, as he joined his chum in the pilot house, having set the motor and other apparatus to working automatically.  “I mean in Logansville?”

“I don’t know.  I’ll have to wait and see how things develop.”

“That’s where Mr. Foger lives, you know.”

“Yes, but I doubt if he is there now.  He and Andy are probably still in the old house here, though what they are doing is beyond me to guess.”

“What do you suppose this new clew is that Mr. Whitford wired you about?”

“Haven’t any idea.  If he wants us to get after it he’ll let us know.  It won’t take us long to get there at this rate.  But I think I’ll slow down a bit, for the motor is warmed up now, and there’s no use racking it to pieces.  But we’re moving nicely; aren’t we, Ned?”

“I should say so.  This is the best all-around airship you’ve got.”

“It is since I put the new motor in.  Well, I wonder what will happen when we get chasing around nights after the smugglers?  It isn’t going to be easy work, I can tell you.”

“I should say not.  How you going to manage it?”

“Well, I haven’t just decided.  I’m going to have a talk with the customs men, and then I’ll go out night after night and cruise around at the most likely place where they’ll rush goods across the border.  As soon as I see the outlines of an airship in the darkness, or hear the throb of her motor, I’ll take after her, and—­”

“Yes, and you can do it, too, Tom, for she can’t hear you coming and you can flash the big light on her and the smugglers will think the end of the world has come.  Cracky!  Its going to be great, Tom!  I’m glad I came along.  Maybe they’ll fight, and fire at us!  If they have guns aboard, as they probably will have, we’ll—­”

“Bless my armor plate!” interrupted Mr. Damon.  “Please don’t talk about such hair-raising things, Ned!  Talk about something pleasant.”

“All right,” agreed Tom’s chum, and then, as the airship sailed along, high above the earth, they talked of many things.

“I think when we sight Logansville.” said Tom, after a while, “that I will come down in some quiet spot, before we reach the city.”

“Don’t you want to get into a crowd?” asked Ned.