'Don't waste time over the pistol,' said Ken sharply. 'Collar the chap himself. He'll be better worth bringing back than a cart load of pistols.'

In an instant Roy's great arms were round Kemp, and lifting him clean off his feet he popped him down in front of Ken.

'Tie him,' said Ken.

'I am an officer,' said Kemp haughtily. 'I will not be bound like a common criminal.'

'You were an English ship's steward when I last saw you,' Ken retorted. 'And engaged in the charming occupation of signalling out of the bathroom port to an enemy submarine.'

It was evidently no news to Kemp that Kenneth Carrington was his adversary of the bathroom. Dark as it had been, he must somehow have recognised him. He glared back defiantly.

'I was serving my country,' he answered with a lofty air.

'And what do you think would have happened to a Britisher who had been caught on a German ship, engaged in an act of such abominable treachery?' returned Ken hotly.

Kemp merely shrugged his shoulders.

'Well, it's not for me to deal with you,' said Ken. 'We'll take him back, Roy, and he'll stand a proper court-martial. Still, as he calls himself an officer, I suppose I must take his parole.'