which the Falcon was fitted, began snapping and cracking.
"Here comes a message!" cried Tom, as he clapped the receiver over his head, and began to translate the dots and dashes.
"It's from Mr. Whitford!" he exclaimed, when he had written it down, and had sent back an answer. "He says: 'Have a tip that smugglers will try to get goods over the border at some point near Niagara Falls to-morrow night. Can you go there, and cruise about? Better keep toward Lake Ontario also. I will be with you. Answer.'"
"What answer did you send?" asked Ned.
"I told him we'd be on the job. It's quite a little run to make, and we can't start until after dark, or otherwise some of the smugglers around here may see us, and tip off their confederates. But I guess we can make the distance all right."
Mr. Whitford arrived at the airship the next afternoon, stating that he had news from one of the government spies to the effect that a bold attempt would be made that night.
"They're going to try and smuggle some diamonds over on this trip," said the custom agent.
"Well, we'll try to nab them!" exclaimed Tom.
As soon as it was dark enough to conceal her movements, the Falcon was sent aloft, not a light
