"You see, Tom, they've stopped, temporarily, bringing goods over the St. Lawrence. They're working now in the neighborhood of Huntington, Canada, and the dividing line between the British possessions and New York State, runs along solid ground there. It's a wild and desolate part of country, too, and I haven't many men up there."
"Don't the Canadian custom officers help?" asked Ned.
"Well, they haven't been of any aid to us so far," was the answer. "No doubt they are trying, but it's hard to get an airship at night when you're on the ground, and can't even see it."
"How did they come to use airships?" asked Tom.
"Well, it was because we were too sharp after them when they tried to run things across the line afoot, or by wagons," replied the agent. "You must know that in every principal city, at or near the border line, there is a custom house. Goods brought from Canada to the United States must pass through there and pay a duty.
"Of course if lawless people try to evade the duty they don't go near the custom house. But there are inspectors stationed at the principal roads leading from the Dominion into Uncle Sam's territory, and they are always on the lookout. They patrol the line, sometimes through a
