Tuppence paused involuntarily and asked:

"Is anything the matter?"

"Ach, yes, everything is the matter." His voice was hoarse and unnatural. "You have a saying here that a thing is neither fish, flesh, fowl, nor good red herring, have you not?"

Tuppence nodded.

Carl went on bitterly:

"That is what I am. It cannot go on, that is what I say. It cannot go on. It would be best, I think, to end everything."

"What do you mean?"

The young man said:

"You have spoken kindly to me. You would, I think, understand. I fled from my own country because of injustice and cruelty. I came here to find freedom. I hated Nazi Germany. But, alas, I am still a German. Nothing can alter that."

Tuppence murmured:

"You must have difficulties, I know -"

"It is not that. I am a German, I tell you. In my heart - in my feeling. Germany is still my country. When I read of German cities bombed, of German soldiers dying, of German aeroplanes brought down - they are my people who die. When that old fire-eating Major reads out from his paper, when he says 'those swine' - I am moved to fury - I cannot bear it."

He added quietly:

"And so I think it would be best, perhaps, to end it all. Yes, to end it."

Tuppence took hold of him firmly by the arm.

"Nonsense," she said robustly. "Of course you feel as you do. Anyone would. But you've got to stick it."

"I wish they would intern me. It would be easier so."

"Yes, probably it would. But in the meantime you're doing useful work - or so I've heard. Useful not only to England but to humanity. You're working on decontamination problems, aren't you?"

His face lit up slightly.

"Ah, yes, and I begin to have much success. A process very simple, easily made and not complicated to apply."

"Well," said Tuppence, "that's worth doing. Anything that mitigates suffering is worth while - and anything that's constructive and not destructive. Naturally we've got to call the other side names. They're doing just the same in Germany. Hundreds of Major Bletchleys - foaming at the mouth. I hate the Germans myself. 'The Germans,' I say, and feel waves of loathing. But when I think of individual Germans, mothers sitting anxiously waiting for news of their sons, and boys leaving home to fight, and peasants getting in the harvests, and little shopkeepers and some of the nice kindly German people I know, I feel quite different. I know then they are just human beings and that we're all feeling alike. That's the real thing. The other is just the war mask that you put on. It's a part of war - probably a necessary part - but it's ephemeral."

As she spoke she thought, as Tommy had done not long before, of Nurse Cavell's words: "Patriotism is not enough. I must have no hatred in my heart."

That saying of a most truly patriotic woman had always seemed to them both the high water mark of sacrifice.

Carl von Deinim took her hand and kissed it. He said:

"I thank you. What you say is good and true. I will have more fortitude."

"Oh, dear," thought Tuppence as she walked down the road into the town. "How very unfortunate that the person I like best in this place should be a German. It makes everything cock-eyed!"

III

Tuppence was nothing if not thorough. Although she had no wish to go to London, she judged it wise to do exactly as she had said she was going to do. If she merely made an excursion somewhere for the day, somebody might see her and the fact would get round to Sans Souci.

No, Mrs Blenkensop had said she was going to London and to London she must go.

She purchased a third return and was just leaving the booking office window when she ran into Sheila Perenna.

"Hullo," said Sheila. "Where are you off to? I just came to see about a parcel which seems to have gone astray."

Tuppence explained her plans.

"Oh, yes, of course," said Sheila carelessly. "I do remember you saying something about it, but I hadn't realized it was today you were going. I'll come and see you into the train."

Sheila was more animated than usual. She looked neither bad tempered nor sulky. She chatted quite amiably about small details of daily life at Sans Souci. She remained talking to Tuppence until the train left the station.

After waving from the window and watching the girl's figure recede, Tuppence sat down in her corner seat again and gave herself up to serious meditation.

Was it, she wondered, an accident that Sheila had happened to be at the station just at that time?

Or was it a proof of enemy thoroughness? Did Mrs Perenna want to make quite sure that the garrulous Mrs Blenkensop really had gone to London?

It looked very much like it.

IV

It was not until the next day that Tuppence was able to have a conference with Tommy. They had agreed never to attempt to communicate with each other under the roof of Sans Souci.

Mrs Blenkensop met Mr Meadowes as the latter, his hay fever somewhat abated, was taking a gentle stroll on the front. They sat down on one of the promenade seats.

"Well? "said Tuppence.

Slowly, Tommy nodded his head. He looked rather unhappy.

"Yes," he said. "I got something. But Lord, what a day. Perpetually with an eye to the crack of the door. I've got quite a stiff neck."

"Never mind your neck," said Tuppence unfeelingly. "Tell me."

"Well, the maids went in to do the bed and the room, of course. And Mrs Perenna went in - but that was when the maids were there and she was just blowing them up about something. And the kid ran in once and came out with a woolly dog."

"Yes, yes. Anyone else?"

"One person," said Tommy slowly.

"Who?"

"Carl von Deinim."

"Oh!" Tuppence felt a swift pang. So, after all -

"When?" she asked.

"Lunch time. He came out from the dining room early, came up to his room, then sneaked across the passage and into yours. He was there for about a quarter of an hour."

He paused.

"That settles it, I think?"

Tuppence nodded.

Yes, it settled it all right. Carl von Deinim could have no reason for going into Mrs Blenkensop's bedroom and remaining there for a quarter of an hour save one. His complicity was proved. He must be, Tuppence thought, a marvellous actor...

His words to her that morning had rung so very true. Well, perhaps they had been true in a way. To know when to use the truth was the essence of successful deception. Carl von Deinim was a patriot all right, he was an enemy agent working for his country. One could respect him for that. Yes - but destroy him too.

"I'm sorry," she said slowly.

"So am I," said Tommy. "He's a good chap."

Tuppence said:

"You and I might be doing the same thing in Germany."

Tommy nodded. Tuppence went on.

"Well, we know more or less where we are. Carl von Deinim working in with Sheila and her mother. Probably Mrs Perenna is the big noise. Then there is that foreign woman who was talking to Carl yesterday. She's in it somehow."

"What do we do now?"

"We must go through Mrs Perenna's room some time. There might be something there that would give us a hint. And we must tail her - see where she goes and whom she meets. Tommy, let's get Albert down here."

Tommy considered the point.

Some years ago, Albert, a page boy in a hotel, had joined forces with the young Beresfords and shared their adventures. Afterwards he had entered their service and been the sole domestic prop of the establishment. Some six years ago he had married and was now the proud proprietor of The Duck and Dog pub in South London.