Only their marble sides and columns remained. All else was dust.

Time and the action of the water had worn them away.

“This is probably the king’s palace,” said Frank; “don’t you think so?”

“Yes,” agreed Wade. “I tell you these were no ordinary people.”

“I believe you.”

But they did not conduct their research much further.

There were chambers beyond the whole interior of the sunken palace, but the two explorers had seen enough.

Frank began to wonder if all was well aboard the Diver, and as for Wade, his head ached to bursting.

So Frank said:

“Have you gone far enough, Wade?”