I hope you will like our home," she added a little shyly.
"We are sure to, dear Princess," Trot hastened to say.
Then Clia escorted them through the archway and into a lofty hall.
It was not a mere grotto, but had smoothly built walls of pink coral inlaid with white.

Trot at first thought there was no roof, for looking upward she could see the water all above them.

But the princess, reading her thought, said with a smile, "Yes, there is a roof, or we would be unable to keep all the sea people out of our palace.

But the roof is made of glass to admit the light." "Glass!" cried the astonished child.

"Then it must be an awful big pane of glass." "It is," agreed Clia.