The Crayfish stuck his tail into the mud. He often did this when he was surprised. It seemed to help him think. When he had thought for a while, he waved his big pinching-claws and said, "It would be better for me not to tell what I think. I used to live near them."

This showed that the Wise Old Crayfish had been well brought up, and knew he should not say unpleasant things about people if he could help it. When there was need of it, he could tell unpleasant truths, and indeed that very evening he did say what he thought of the Eels. That was when he was teaching some young Crayfishes, his pupils. Their mother had brought up a large family, and was not strong. She had just cast the shell which she had worn for a year, and now she was weak and helpless until the new one should harden on her. "It is such a bother," she said, "to keep changing one's shell in this way, but it is a comfort to think that the new one will last a year when I do get it."

While their mother was so weak, the Wise Old Crayfish amused the children, and taught them things which all Crayfishes should know. Every evening they gathered around him, some of them swimming to him, some walking forward, some sidewise, and some backward. It made no difference to them which way they came. They were restless pupils, and their teacher could not keep them from looking behind them. Each one had so many eyes that he could look at the teacher with a few, and at the other little Crayfishes with a few more, and still have a good many eyes left with which to watch the Tadpoles. These eyes were arranged in two big bunches, and, unless you looked very closely, you might think that they had only two eyes apiece. They had good ears, and there were also fine smelling-bristles growing from their heads. The Wise Old Crayfish sometimes said that each of his pupils should sit in a circle of six teachers, so that he might be taught on all sides at once.

"That is the way in which children should learn," he said, "all around at once. But I do the best I can, and I at least teach one side of each."

This evening the Wise Old Crayfish was very sleepy. There had been so much talking and excitement during the day that he had not slept so much as usual; and now, when he should have been wide awake, he felt exceedingly dull and stupid. When he tried to walk, his eight legs stumbled over each other, and the weak way in which he waved his pinching-claw legs showed how tired he was.

After he had told his pupils the best way to hold their food with their pinching-claws, and had explained to them how it was chewed by the teeth in their stomachs, one mischievous little fellow called out, "I want to know about the Eels. My mother would never let me go near them, and now they've moved away, and I won't ever see them, and I think it's just horrid."

"Eels, my children," said their teacher, "are long, slender, sharp-nosed, slippery people, with a fringe of fins along their backs, and another fringe along their bellies. They breathe through very small gill-openings in the backs of their heads. They have large mouths, and teeth in their mouths, and they are always sticking out their lower jaws."

"And how do—" began the Biggest Little Crayfish.

"Ask me that to-morrow," said their teacher, stretching his eight walking legs and his two pinching-claw legs and his tail paddles, "but remember this one thing:—if you ever see an Eel, get out of his way. Don't stop to look at him."

"We won't," said one little Crayfish, who thought it smart to be saucy. "We'll look to stop at him." All of which meant nothing at all and was only said to annoy his teacher.