going in one of the houses they ate off a table of solid gold, and off dishes of the precious, yellow metal. Yet they would have given it all—yes, even the gold in their dirigible balloon—for a chance for freedom.
"I wonder what became of the chaps who used to live here?" mused Ned as he finished the rather frugal meal.
"Oh, they probably died—from a plague maybe, or there may have been a war, or the people may have risen in revolt and killed them off," suggested Tom grimly.
"But then there ought to be some remains—some mummies or skeletons or something."
"I guess every one left this underground city—every soul," suggested Mr. Damon, "and then they turned on the river and left it. I shouldn't be surprised but what we are the first persons to set foot here in thousands of years."
"And we may stay here for a thousand years," predicted Tom.
"Oh, good land a' massy; doan't say dat!" cried Eradicate "Why we'll all be dead ob starvation in dat time."
"Before then, I guess," muttered Tom. "I wonder if there's any water in this hole?"
"We'll need it—soon," remarked Ned, looking
