The travelers spent a few minutes examining the queer, carved serpent. There were no other evidences of the existence of man at hand, and, except for the two roads, there was nothing to be seen but an almost unbroken forest. It was a wild part of Mexico.
“Well, what are we going to do?” asked Jerry. “Go on or stay here?”
“Go on, by all means,” said the professor. “Why, we may be only a little way from the buried city! Just think of it! There will be wealth untold for us!”
“One thing puzzles me though,” observed Bob.
“What is it, Chunky?” asked Ned.
“How are we going to know this buried city when we come to it?”
“How?” came from Jerry. “Why, I suppose there’ll be a railroad station, with the name of the city on it. Or there may be trolley cars, so we can ask the conductors if we are at the underground town. Don’t you worry about knowing the place when you get to it.”
“But if it’s underground, how are we going to find it?” persisted Bob. “It isn’t like a mine, for people who know the signs can tell where gold or silver is hidden under the ground. But a city is different.”
“I confess that question has been a puzzle to me,” admitted Professor Snodgrass. “The only thing to do is to keep on along this road until we come to the place, or see some evidence that a buried city is in the vicinity.”