Stewart groaned.

“Then we shall have to get out! Take my advice and don’t wait to be asked twice!”

“Perhaps they will not need this corner. In any case, we will stay until they put us out. If you are wise, you will forget all the German you know and flourish your passport frequently. Germans are always impressed by a red seal!”

But, strangely enough, they were not disturbed. A number of officers approached the carriage, and, after a glance at its inmates, passed on to the other compartments. Stewart, putting his head out of the window, saw that the line of police were still keeping back the crowd.

“Really,” he said, “this seems too good to be true. It looks as if we were going to have this compartment to ourselves.”

He turned smilingly to glance at her, and the smile remained frozen on his lips. For her face was deathly pale, her eyes were staring, and she was pressing her hands tight against her heart.

“You’re not ill?” he asked, genuinely startled.

“Only very tired,” she answered, controlling her voice with evident difficulty. “I think I shall try to rest a little,” and she settled herself more comfortably in her corner. “The journey from Spa quite exhausted me.” Then with her lips she formed the words “Be careful!”

“All right,” said Stewart. “Go to sleep if you can.”

She gave him a warning glance from under half-closed lids, then laid her head back against the cushions and closed her eyes.