"Well, if I must, I must; but I'm sorry to confess what a fool I've been. You know what coral is, don't you?"
"No," said Freddy, wondering why it asked.
"Then I must tell you, I suppose. There is a bit in the house there,—that rough, white, stony stuff on the table in the parlor. It's full of little holes, you know. Well, those holes are the front doors of hundreds of little polypes, or coral worms, who build the great branches of coral, and live there. They are of various shapes and colors,—some like stars; some fine as a thread, and blue or yellow; others like snails and tiny lobsters. Some people say the real coral-makers are shaped like little oblong bags of jelly, closed at one end, the other open, with six or eight little feelers, like a star, all around it. The other creatures are boarders or visitors: these are the real workers, and, when they sit in their cells and put out their feelers, they make all manner of lovely colors under the water,—crimson, green, orange, and violet. But if they are taken up or touched, the coral people go in doors, and the beautiful hues disappear. They say there are many coral reefs and islands built by these industrious people, in the South Seas; but I can't go there to see, and I am contented with those I find in the northern latitudes. I knew such a community of coral builders, and used to watch them long ago,
