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
