Straight across the Smiling Pool swam Billy Mink toward the big green lily pad where Grandfather Frog sat dreaming of the days when the world was young. When he was right under the big green lily pad he suddenly kicked up hard with his hind feet. Up went the big green lily pad, and, of course, up went Grandfather Frog--up and over flat on his back, with a great splash into the Smiling Pool! Now, Grandfather Frog's mouth is very big. Indeed, no one else has so big a mouth, unless it be his cousin, old Mr. Toad. And when Grandfather Frog went over flat on his back, splash in the Smiling Pool, his mouth was wide open. You see he was so surprised he forgot to close it. So, of course, Grandfather Frog swallowed a great deal of water, and he choked and spluttered and swam around in foolish little circles trying to find himself. Finally he climbed out on his big green lily pad. [Illustration: He was so surprised he forgot to close it.] "Chug-a-rum?" said Grandfather Frog, and looked this way and looked that way. Then he gave a funny hop and turned about in the opposite direction and looked this way and looked that way, but all he saw was the Smiling Pool dimpling and smiling, Mrs. Redwing bringing a fat worm to her hungry little babies in their snug nest in the bulrushes, and the Merry Little Breezes hurrying over to see what the trouble might be. "Chug-a-rum!" said Grandfather Frog. "It is very strange. I must have fallen asleep and had a bad dream." Then he once more settled himself comfortably on the big green lily pad, folded his hands across his white and yellow waistcoat, and seemed to be dreaming again, only his big goggly eyes were not dreaming. No, indeed! They were very much awake, and they saw all that was going on in the Smiling Pool. Great-Grandfather Frog was just pretending. You may fool him once, but Grandfather Frog has lived so long that he has become very wise, and though Billy Mink is very smart, it takes some one a great deal smarter than Billy Mink to fool Grandfather Frog twice in the same way. Billy Mink, hiding behind the Big Rock, had laughed and laughed till he had to hold his sides when Grandfather Frog had choked and spluttered and hopped about on the big lily pad trying to find out what it all meant. He thought it such a good joke that he couldn't keep it to himself, so when he saw Little Joe Otter coming to try his slippery slide he swam across to tell him all about it. Little Joe Otter laughed and laughed until he had to hold his sides. Then they both swam back to hide behind the Big Rock to watch until Grandfather Frog should forget all about it, and they could play the trick over again.