the smuggling may be done over such a wide area that it would need a whole fleet of airships to capture even one of the others, for they might choose a most unfrequented place to cross the border."
"Oh, we would be in communication with you," said the agent. "We can come pretty near telling where the contrabrand goods will be shipped from, but the trouble is, after we get our tips, we can't get to the place before they have flown away. But with your airship, you could catch them, after we sent you, say a wireless message, about where to look for them. So that's no objection. You have a wireless outfit on your airships, haven't you, Tom?"
"Yes, that part is all right."
'Then you can't have any more objections, Tom."
'Well, there are some. For instance you say most of this smuggling is done at night."
"Practically all of it, yes."
'Well, it isn't going to be easy to pick out a contraband airship in the dark, and chase it. But I'll tell you what I'll do, Mr. Whitford. I feel as if I had sort of 'fallen down' on this clew business, as the newspaper men say, and I owe it to you to make good in some way."
"That's what I want—not that I think you
