Mappo sprang for the pipe, and began to climb up it. He did not know exactly what he was going after, but he knew it must be something important, or his master would not be so excited.

"Get the baby! Get the baby!" cried the circus man, for the firemen had not yet come up with their ladders. Of course they could have saved the baby, if they had been in time. But it would soon be too late.

Up and up the rain-water pipe went the nimble Mappo. In a few seconds he was on the window sill of the room. He stood there, looking down at his master.

"Go on in! Get the baby and bring her down!" called the circus man, waving his arms at Mappo.

Down into the room jumped Mappo. He knew at once it was a bedroom, for he had been in such rooms in the home of the boy who found him in the woods. And, in a little bed, close to the window, was something that Mappo at first thought was a large doll, such as the sisters of the boy used to play with.

"I wonder if this is the baby," said Mappo. "I guess it is. I'll carry it down."

The baby was asleep. Mappo took her up in one of his strong hairy arms, and, very luckily he picked her right-side up. Some monkeys would carry a baby upside down, and think nothing of it. But Mappo was different.

With the baby held closely, the monkey jumped to the window sill again, and how his master and the others yelled when they saw him!

"He has her! Oh, he has your baby!" cried the circus man.

Down the rain-pipe came Mappo carrying the little baby, which was just beginning to wake up and cry. Mappo gave the little one to his master, who put the baby in its anxious mother's arms.