"Yes, and not moving very fast, either. They seem to be circling around here."
The young inventor was peering through the binoculars, and, as soon as he had the mysterious craft in focus, he cried:
"Look, Mr. Jackson, it's a new kind of monoplane. I never saw one like it before. I wonder who could have invented that? It's something like a santos—Dumont and a Bleriot, with some features of Cornu's Helicopter. That's a queer machine."
"It certainly is," agreed the engineer, who was now sighting through the glasses. In spite of the darkness the binoculars brought out the peculiarities of the aeroplane with considerable distinctness.
"Can you make out who are in it?" asked Tom.
"No," answered Mr. Jackson. "You try."
But Tom had no better luck. There were two persons in the odd machine, which was slowly flying along, moving in a great circle, with the Swift house for its center.
"I wonder why they're hanging around here?" asked Tom, suspiciously.
"Perhaps they want to talk to you," suggested Mr. Jackson. "They may be fellow inventors—perhaps one of them is that Philadelphia man who had the Whizzer."
