Smiles appeared on the faces of his listeners. And here and there a cough sounded. It was plain that the company had little faith in Mr. Frog's easy explanation.

"Doesn't it hurt your skin to breathe through it?" some one else asked.

"What if it does?" Ferdinand Frog retorted. "When your skin becomes worn, pull it off!"

Everybody laughed heartily at his answer; or at least, everybody except Long Bill Wren and his wife. They exchanged a thoughtful look. For they knew Mr. Frog's ways better than his other neighbors did.

Now, Ferdinand Frog did not mind the laughter at all.

"Of course," he went on, "you can't breathe through your skin quite so well as you can in the regular way. After you have stayed in the mud a while, you'll begin to want a regular breath of fresh air. So then you come up to the top of the water."

"Cat-tails and pussy-willows!" Long Bill Wren cried out. "I'm sure I shall never take a mud bath. They seem to me to be very dangerous."

"Not at all!" Mr. Frog assured him. "They're as safe as standing on your head." And thereupon he stood on his own head, to prove that what he said was true.

Still the company was not moved to take Mr. Frog's advice and try a mud bath. Most of them declared that nothing could induce them to undertake such a risky act. But a few daring ones said that if all the rest would take mud baths, and if they found that they liked them, they themselves would be willing to test them too.

However, nobody took a single step towards the creek. So at last the company scattered, leaving Long Bill Wren and Mr. Frog alone upon the bank.