"They went west," Harry corrected. "That isn't the way home!"
"I'd like to know just what success they have had," Jack went on. "Say," he continued, "can't we do something to attract their attention? Why not set fire to some big dry tree and let her blaze up?"
"I just can't have it this way!" Harry said. "I can't stand it to have them come so close to us and then go away without knowing we are here. We've got to bring them down in some way."
"But they've gone!" Frank declared, gravely.
"If we make a big blaze," Jack hastened to say, "the reflection on the clouds will attract their attention, and they'll come back. They won't be able to see the fire itself, of course, but they'll see the reflection, and that will bring them down to investigate. Then we'll fire our revolvers and wigwag with blazing sticks until they see who we are."
"It may not be the Nelson," Harry suggested.
"I don't believe there's any other aeroplane sailing about the roof of the world," Frank replied. "Of course it is the Nelson!"
"Perhaps the Nelson was followed," Harry went on. "I've heard of such things. The chap in that machine may be looking for Ned. Anyway," he added, "it won't do any harm to let the aviator, whoever he is, know that we are here. Come on, let's go ashore and build a big fire."
"I certainly would give a year's growth to know whether that is the Nelson," Harry said, as the boys sought the shore and began gathering dry wood, which, it may be well to add, was not easy to find, as there had been quite a shower during the day. "For all we know," he continued, "there may be another aeroplane here. If the people who are trying for the Lyman concession are as active here as they seem to have been in Paraguay, they may have half a dozen airships out after the Nelson."
Finally a quantity of wood which was fairly dry was secured, and Jack bundled it up against a dead tree which seemed to run straight up into the sky until it touched the clouds. But when the boys came to apply matches they discovered that the wood was not dry enough to be ignited in that way.