“What is it?” questioned Mr. Dale.
“I think I guess the motive of Jerry Dawson’s visit now,” said Dave. “The little black box he had under his arm was a camera. This is the flashlight disc.”
“Hello!” exclaimed Mr. King, comprehendingly.
“They have been photographing our balloon!” cried Leblance.
“Exactly,” asserted the young aviator.
The engineer and Mr. Dale exchanged disturbed looks. Mr. King was thoughtful.
“We might have expected it,” he said, but to Dave only.
“How is that?” inquired our hero.
“I’ll tell you soon as we reach the house. I am glad they did no harm to the balloon. I hardly think they will try that, Leblance,” he said to the Frenchman, “but you had better get one of your men to stay on watch here nights.”
“Yes, yes,” responded Leblance earnestly. “We have been warned, we must look out.”