“That’s what our friend Kearns said they were,” replied the Professor. “I suppose we had best follow them and return toward earth.”
Again the Professor juggled with his levers and they shot rapidly downward.
“There’s something else going on there,” remarked Mortimer as he eyed the pursued. “What is it?”
They had descended many hundreds of feet. A number of mountain tops, apparently forming part of an extensive range, were more or less indistinctly outlined below.
“Mountains?” commented the Professor.
“Yes,” said Mortimer, “and from the general lay of the land I should say the heart of the Adirondacks. But what are they doing there?” he inquired eagerly, pointing to the pursued, who were manœuvering with some instrument projecting over one of their quarters.
The Professor watched closely for some minutes.
“It’s some signaling instrument,” he said at last. “They are signaling the land.”