"Do you—you think he can get in at the window?" faltered Nan. She was so scared she could scarcely speak.
"I don't know, I'm sure. If you'll stand by the door, Nan, I'll try to guard the window."
Nan threw her form against the door and held it as hard as if a giant were outside trying to force it in. Bert felt around the empty shed and picked up the handle of a broken spade. With this in hand he stalked over to the one little window which was opposite the door.
"Are there any cows here?" asked Nan. It was so dark she could see next to nothing.
"No cows here, I guess," answered Bert. "This building is 'most ready to tumble down."
The dog outside was barking still. Once in a while he would stop to catch his breath and then he would continue as loudly as ever. He scratched at the door with his paw, which made Nan shiver from head to feet.
"He is trying to work his way in," she cried.
"If he does that, I'll hit him with this," answered her twin brother, and brandished the
