"My appearance must have taken a little getting over," I suggested.

Latimer shrugged his shoulders. "Apart from your features you exactly fitted the bill, and I had learned enough about McMurtrie's past performances not to let that worry me. What I couldn't make out was why he should have run the risk of helping you. Of course you might have offered him a large sum of money—if you had it put away somewhere—but in that case there seemed no reason why you should be hanging about in a hut on the Thames marshes."

"Why didn't you tell the police?" asked Tommy.

"The police!" Latimer's voice was full of pleasant irony. "My dear Morrison, we don't drag the police into this sort of business; our great object is to keep them out of it. Mr. Lyndon's affairs had nothing to do with me officially apart from his being mixed up with McMurtrie. Besides, my private sympathies were entirely with him. Not only had he tried to save my life at Parelli's, but ever since the trial I have always been under the impression he was fully entitled to slaughter Mr.—Mr.—whatever the scoundrel's name was."

I acknowledged the remark with a slight bow. "Thank you," I said. "As a matter of sober fact I didn't kill him, but I shouldn't be the least sorry for it if I had."

Latimer looked at me for a moment straight in the eyes.

"We've treated you beautifully as a nation," he said slowly. "It's an impertinence on my part to expect you to help us."

I laughed. "Go on," I said. "Let's get it straightened out anyhow."

"Well, the straightening out must be largely done by you. As far as I'm concerned the rest of the story can be told very quickly. For various reasons I got to the conclusion that in some way or other the two gentlemen on Sheppey had a good deal to do with the matter. My men had been making a few inquiries about them, and from what we'd learned I was strongly inclined to think they were a couple of German naval officers over here on leave. If that was so, the fact that they were in communication with Hoffman made it pretty plain where McMurtrie was finding his market. My men had told me they were generally away on the mainland in the evening, and I made up my mind I'd have a look at the place the first chance I got. I asked Morrison to come down and pick me up in his boat for two reasons—partly because I wanted to keep in touch with you both, and partly because I thought it might come in handy to have a second line of retreat."

"It was rather convenient, as things turned out," interposed Tommy.