"What is it?" he asked.

"Trouble," was Billie's laconic reply. "Come out."

"How can I? The guard is at the door."

"Jump out of the window."

"They might see me."

Billie thought fast.

"Let Ad stand between you and the door."

"Great," from Donald.

He aroused Adrian and told him the situation.

"You stay in the train," he said, "and we'll keep you posted as to what is going on outside. If there is any real danger we will give the alarm."