It was true that while she dressed more warmly and secured a blanket from her berth to wrap around herself over her coat, she was aware that the noise on the upper deck had ceased. But she did not realize the significance of this.

Being all alone, she had much difficulty in arraying herself as she wished. Her shoulder was stiff and she could not use her left arm very much without causing the shoulder to hurt excruciatingly. So she was long in getting out of the room again.

Just as she did so she heard a man shouting up the passage:

“Anybody here? Get out on deck! Last call! The boats are leaving!”

The shout really startled Ruth. She had no idea there was any chance of her being left behind. She left her stateroom door open and started to run through the narrow corridor.

Not six feet from the door she tripped over something. It was a cord stretched taut across the passage, fastened at a height of about a foot from the deck!

Helplessly, with her hands full and the blanket over her right arm, Ruth pitched forward on her face. She struck her head on the deck with sufficient force to cause unconsciousness. With a single groan she rolled over on her back and lay still.

CHAPTER XIV—A BATTLE IN THE AIR

The first few seconds which passed after Ralph Stillinger and Tom Cameron descried the huge envelope of the Zeppelin beneath their airplane in the fog were sufficient to allow the American ace to regain his self-possession. If his passenger was frightened by the nearness of the German airship he did not betray that fact.

The thundering of the motors of the great airship, as well as the clatter of their own engine, made speech between the two Americans quite impossible. But the meaning of Stillinger’s gestures was not lost on Tom.