As the ship sailed slowly over the mountain, Mark gazed down and exclaimed: 

“Doesn’t that look like the ruins of some building?”

The professor took a pair of field glasses from a rack in the wall and took a long view.

“It must be the place,” he said in a low voice.

“What place?” asked Jack.

“The temple of treasure,” was the answer.  “Hankos told me it was on top of the highest mountain in the land, and this must be it, for it is the loftiest place we have seen.  But we must be careful, for there is danger down there.”

“What kind?” asked Mark.

“The place was long ago deserted by the giants,” Mr. Henderson went on.  “Ages ago it was one of their storehouses for treasure, but there were wars among themselves, Hankos said, and this part of the country was laid waste.  Savage beasts took up their abode in the temple, and since then, in spite of the great size of the giants, they have not dared to venture here.  If we brave the animals we may have all the gold and diamonds we can take away.”

“Then for one, I’m willin’ t’ go down an’ begin th’ extermination at once,” put in Andy.  “I’ve always wanted t’ be rich.”

“We must proceed cautiously,” the professor said.  “We are ill prepared to fight any such beasts as we saw at the big geyser.  At the same time they may have deserted this place.  I think we will lower the ship down over the temple, and spend several hours in observation.  Then, if nothing develops, we can enter and see if the treasure is there.”

This plan was voted a good one, and the Mermaid after having been steered directly over the ruined temple, was brought to a halt, and enough gas let out so that it fell to about fifty feet in the air above it.

The adventurers began their watch.  The afternoon waned and there were no signs of any beasts in or about the temple.

“I reckon we can take a chance,” said Andy, who was anxious to get his hands on some diamonds.

“Better wait until morning,” counseled Mr. Henderson.  “It will soon be dark, and it doesn’t look like a nice place to go stumbling about in by moonlight.”

So, though all but the scientist were anxious, they had to wait until the night had passed.  Several times Washington got up to see if the temple had, by any chance, taken wings during the long hours of darkness, but each time he found it was still in place.

“Seems laik it’ll never come mornin’.” he said.

But dawn came at length, and, after a hasty breakfast, preparations to enter the temple were made.  Andy loaded his gun for “bear” as he expressed it, and the boys each took a revolver.

The ship was lowered to as level a place as could be found, and then, seeing that everything was in readiness for a quick departure, the professor led the way out of the Mermaid.

The entrance to the temple was through a big arched gateway.  Some of the stones had fallen down, and the whole structure looked as if it might topple over at any moment.