'Because he launches it from Switzerland it doesn't follow that the war-head will explode there,' remarked C.B. Then he turned to Otto and asked, 'Can you give us any idea how far the fuel he's got would carry his rocket?'

After thinking for a moment the scientist said, 'I can give only an answer that may be widely out. So much depends on the weight of his rocket but, if it conforms to normal standards, I'd say that with my new fuel he could send a rocket of that size anything from four to eight hundred miles.'

Richter's heavily-lidded eyes opened wide, and he exclaimed, 'Snakes alive! Then if he has the know-how to direct it accurately he might put it down on Paris, London or Berlin.'

'He has the know-how all right,' Otto replied glumly. 'He has been a top-line rocket scientist from the Peenemünde days, and that is sixteen years ago. But he won't put it on Berlin. My family is of German extraction, and Lothar has always had a passion for the Fatherland.'

The door opened and Barney came in. He made a quick apology to his Chief for being late, explaining that a learner-driver had run into his taxi, so held him up while a policeman was taking notes. Then he said excitedly,

'I've got something here, Sir, that may prove important. Mrs. Morden thrust it on me just before we left the Cedars on Saturday night. Owing to all that happened afterwards I forgot about it, and yesterday afternoon I was so dead beat that I simply threw my clothes on the floor and flopped into bed. This morning when I picked them up I came across it in my pocket. It's a spool of recorder tape.'

Verney took the small nail-varnish carton and shook out the spool; then he switched on the inter-com. and asked for a tape-recorder machine to be sent up. Five minutes later the tape was inserted in the machine and being played back.

An American voice said harshly, 'Get your clothes off,' then Mary's voice came, panic-stricken and pleading that she really had not meant to run away. Next second her piercing screams rang through the room, followed by a ghastly sobbing, then silence.

Beads of sweat had broken out on Barney's face. Fiercely he exclaimed, 'The swine! The swine! Then she did try to escape from him but he caught her. Oh, the swine! What did he do to her!'

'Shut up,' snapped C.B., for Mary's voice was coming from the machine again, but now it was quite normal. She was saying, 'I behaved very stupidly yesterday when you were telling me about human sacrifice. If I am to be a really good witch I ought to prepare myself to witness such ceremonies . . .'