"Yes, I guess so!" exclaimed Bunny.

The little boy saw a nail head sticking out. He slipped the claw of the hammer under it and pressed hard on the handle.

Whether Bunny had not put the claw far enough under the nail, or whether the head was so small that the claw slipped off, neither of the children knew. But what happened was that Bunny's hand slipped, the hammer also slipped away from his grasp, and the next moment, with a crash and tinkle of glass, the hammer broke through the window and fell outside.

"Oh, Bunny! are you hurt?" cried Sue, for once she had seen her mother cut her hand trying to open a window that stuck.

"No, I'm not hurt," answered her brother. "But the hammer's gone out."

"You can get another. There's lots here," said Sue.

"But I can't fix the window," said Bunny, rather sadly. "It's all busted!"

"It wasn't your fault!" said Sue stormily. "Mr. Foswick ought never to have locked us in, and then you wouldn't have to try to unnail a window to get out! It's his fault!"

"Maybe it is," said Bunny, leaning forward to look out of the broken window.

"Don't try to crawl out!" exclaimed Sue. "You might get cut!"