Jerry Muskrat nodded his head. “Grandfather Frog is right,” said he. “Of course there must be a cause, but where are we to look for it? I've been all over the Smiling Pool, and I'm sure it isn't there.”
Grandfather Frog actually smiled. “Chugarum!” said he. “Of course the cause of all the trouble isn't in the Smiling Pool. Any one would know that!”
“Well, if you know so much, tell us where it is then!” snapped Jerry Muskrat.
“In the Laughing Brook, of course,” replied Grandfather Frog.
“No such thing!” said Billy Mink. “I've been all the way down the Laughing Brook to the Big River, and I didn't find a thing.”
“Have you been all the way up the Laughing Brook to the place it starts from?” asked Grandfather Frog.
“Well, that's where the cause of all the trouble is,” said Grandfather Frog, just as if he knew all about it. “It's the water that comes down the Laughing Brook that makes the Smiling Pool, and the Smiling Pool never could dry up if the Laughing Brook didn't first stop running.”
“That's so! I never had thought of that,” cried Little Joe Otter. “I tell you what, Billy Mink and I will go way up the Laughing Brook and see what we can find.”
“Chugarum! Let us all go,” said Grandfather Frog.
Then the five put their heads together and decided that they would go up the Laughing Brook to hunt for the trouble.
Ol' Mistah Buzzard, sailing high in the blue, blue sky, looked down on a funny sight. Yes, Sir, it certainly was a funny sight. It was a little procession of five of his friends of the Smiling Pool. First was Billy Mink, who, because he is slim and nimble, moves so quickly it sometimes is hard to follow him. Behind him was Little Joe Otter, whose legs are so short that he almost looks as if he hadn't any. Behind Little Joe was Jerry Muskrat, who is a better traveler in the water than on land. Behind Jerry was Grandfather Frog, who neither walks nor runs but travels with great jumps. Last of all was Spotty the Turtle, who travels very, very slowly because, you know, he carries his house with him. And all five were headed up the Laughing Brook, which laughed no more, because there was not water enough in it.
Now Ol' Mistah Buzzard hadn't been over near the Smiling Pool for some time, and he hadn't heard how the Smiling Pool had stopped smiling, and the Laughing Brook had stopped laughing. When he looked down and saw how the water was so nearly gone from them that the trout and the minnows had hardly enough in which to live, he was so surprised that he kept saying over and over to himself: