“Have patience,” replied the professor. “I have not steered toward it yet. There are other things to see.”

Just then Washington’s voice could be heard calling from the conning tower:

“We’re coming to a big mountain!”

CHAPTER XXVIII
THE TEMPLE OF TREASURE

“What’s that?” fairly yelled the professor.

“We am propelling ourselves in a contiguous direction an’ in close proximity to an elevated portion of th’ earth’s surface which rises in antiguous proximity t’ th’ forward part of our present means of locomotion!” said the colored man in a loud voice.

“Which means there may be a collision,” the professor said, as he and the boys hurried toward the tower.

“Jest what I said,” retorted Washington. “What’ll I do?”

“Send the ship a little higher,” answered Mr. Henderson. “We mustn’t hit any mountains.”

Washington forced more gas into the holder, and speeded the negative gravity machine up some, so that the Mermaid, which was flying rather low, ascended until it was in no danger of colliding with the peak which reared its lofty height just ahead of them.