"It's something," Frank exclaimed, "but I don't believe it is a star."
"It may be a reflector at the top of the Flatiron building," grinned
Jack. "What is it, if it isn't a star?"
"Look yourself!" cried Frank.
The boys were all looking now. They saw the light which Jack had mistaken for a star flashing to and fro under the clouds like a firefly. It rushed earthward with amazing speed for an instant, then spiraled upward again. Once it came directly over the Black Bear, and seemed about to drop down.
Jack threw a couple of panels open, and then the whirr of motors reached their ears. Frank sprang outside and turned a flashlight upward.
"There's your star!" he shouted to Jack.
"Quick!" Harry cried. "Wigwag with that light. It is the Nelson!
They may be able to see us!"
"Yell, every soul of you!" directed Frank. "Yell! She is going away!"
The boys waved their lights frantically and shouted at the top of their voices, but the light in the sky crept away to the west and soon disappeared, evidently passing above the clouds which lay like a black blanket over the Brazilian forests.
"Great heavens!" Jack sighed. "If we could only have made them hear! I'll bet they've been to Paraguay and released Lyman. Now they're going back home! Fine show we now stand of having any fun with them!"