“You have a great deal to worry you,” said Louise sympathetically. “And you work too hard.”

“I’ll be all right as soon as Burt’s trial is over. He’s not here this morning—” Sara’s voice broke. “In fact, I don’t know where he is.”

Louise and Penny said nothing, though the remark astonished them.

“Burt was out all last night,” Sara spoke and then seemed to realize that her words easily could be misinterpreted. She added hastily: “He’s been trying to gain evidence which will prove his innocence.”

“You mean your brother went away yesterday and failed to return?” Penny asked after a moment.

Sara nodded. “He’s on the trail of the real saboteurs, and it’s dangerous business. That’s why I’m so worried. I’m afraid he’s in trouble.”

“Have you talked to the police?” Penny inquired.

“Indeed, I haven’t.”

“Didn’t your brother tell you where he was going when he left home?”

“No, he didn’t. He keeps things from me because he says I worry too much now.”