Nicknack turned at the sound of his little master's voice, and just then he saw another ice window. The sun was shining on that, too, and once more Nicknack noticed the reflection of himself in the bright ice, which was like glass.
"Baa-a-a-a-a!" he bleated again. "Baa-a-a-a!"
"Look out! He's going to jump!" cried Tom.
He made a grab for the goat, but only managed to get hold of his short, stubby tail. To this Tom held as tightly as he could, but Nicknack was not going to be stopped for a little thing like that.
Forward he jumped, but he did not quite reach the ice window. Instead his horns and head butted against the side wall of the snow house, and in it he made a great hole, near the window.
This made the wall so weak that the snow house began to cave in, for the other wall had almost all been knocked down when the goat jumped through that.
"Look out!" cried Ted. "It's going to fall!"
"Come on!" yelled Tom, letting go of Nicknack's tail.
"Take care of Trouble!" begged Jan of her brother.
Ted caught his little brother up in his arms. It was as much as he could do, but, somehow or other, Ted felt very strong just then. He was afraid Trouble would be hurt.