the dome overhead looked like the sky when seen from earth. In the
center of this immense sea cavern rose the towers of a splendid
castle, all built of coral inlaid with silver and having windows of
clear glass.

Surrounding the castle were beds of beautiful sea flowers, many
being in full bloom, and these were laid out with great care in
artistic designs. Goldfish and silverfish darted here and there
among the foliage, and the whole scene was so pretty and peaceful
that Trot began to doubt there was any danger lurking in such a
lovely place.

As they approached to look around them, a brilliantly colored
gregfish approached and gazed at them curiously with his big,
saucer-like eyes. "So Zog has got you at last!" he said in a pitying
tone. "How foolish you were to swim into that part of the sea where
he is powerful."

"The sea devils made us," explained Clia.

"Well, I'm sorry for you, I'm sure," remarked the Greg, and with a
flash of his tail, he disappeared among the sea foliage.

"Let us go to the castle," said the Queen in a determined voice. "We
may as well boldly defy our fate as to wait until Zog seeks us out."

So they swam to the entrance of the castle. The doors stood wide
open, and the interior seemed as well lighted as the cavern itself,
although none of them could discover from whence the light came.