"Yes," I said.

"Well, if that was so, and you had been wrongly convicted, which I was inclined to believe, the doctor's presence on the scene seemed to require a little looking into. I knew that at that time he had only just arrived in London, so the odds were that he and Marks were old acquaintances. I hunted up the evidence in your trial--I had rather forgotten it--and I found just what I expected. Beyond the fact that Marks was a foreigner and had been living in London for about eight years, no one seemed to know anything about him at all. The police were so confident in their case against you that apparently they hadn't even bothered to make the usual inquiries. If they had taken the trouble to communicate with St. Petersburg, they could have found out all about Mr. Marks without much difficulty. The authorities there have a wonderfully complete system of remembering their old friends."

"But three years afterwards--" I began.

"It makes very little difference, especially as just at present we are on excellent terms with the Russian Secret Service. They took the matter up for me, and last night I got the full particulars I wanted about the man who had given away McMurtrie and his friends in St.

Petersburg. There can be no question that he and Marks were the same person."

I took a long--a very long breath.

"There remains," I said, "the Home Office."

"I don't think you need be seriously worried about the Home Office,"

returned Latimer serenely. "By this time they have a full statement of the case--except, of course, for my direct evidence that I heard the doctor actually bragging of his achievement. I had a long interview with Cas.e.m.e.nt before I left London this morning, and he said he would go round directly after breakfast. He evidently arrived just too late to prevent the order for your arrest."

I nodded. "Sonia must have gone to the police last night," I said; and then in a few words I told him of the telegram I had received from Gertie 'Uggins, and how it had just enabled me to get away.

"I don't know," I finished, "how much my double escape complicates matters. However unjust my sentence was, there's no denying I've committed at least three felonies since. I've broken prison, plugged a warder in the jaw, and shoved an oar into a policeman's tummy. Do you think there's any possible chance of the Home Secretary being able to overlook such enormities?"

Latimer laughed easily. "My dear Lyndon," he said, "in return for what you've done for us, you could decimate the police force if you wanted to." Then, speaking more seriously, he added: "I tell you frankly, there's every chance of a huge European war in the near future, and you can see the different position we should be in if the Germans had got hold of this new powder of yours. Apart from that, the Government owe you every possible sort of reparation for the shameful way you've been treated. If there's any 'overlooking' to be done, it will be on your side, not on theirs."

We were entering the dreary main street of Queenborough as he spoke, and before I could answer he drew up outside the post-office.

"We've just time to send off a telegram," he said. "I want to make sure of seeing Lammersfield and Cas.e.m.e.nt directly we get to town. They will probably be at lunch if I don't wire."

He entered the building, and Tommy took advantage of his brief absence to lean over the back of the seat and grip my hand.

"We've done it, Neil," he said. "d.a.m.n it, we've done it!"

"_You've_ done it, Tommy," I retorted. "You and Joyce between you."

There was a short pause, and then Tommy gave vent to a deep satisfied chuckle.

"I'm thinking of George," he said simply.

It was such a beautiful thought that for a moment I too maintained a voluptuous silence.

"We must find out whether they're going to prosecute him," I said. "I don't want to clash with the Government, but whatever happens I mean to have my five minutes first. They're welcome to what's left of him."

Tommy nodded sympathetically, and just at that moment Latimer came out of the post-office.

We got to the railway station with about half a minute to spare.

The train was fairly crowded, but a word from Latimer to the station-master resulted in our being ushered into an empty "first"

which was ceremoniously locked behind us. It was not a "smoker," but with a fine disregard for such trifles Latimer promptly produced his cigar case, and offered us each a delightful-looking Upman. There are certainly some advantages in being on the side of the established order.

Soothed by the fragrant tobacco, and with an exquisite feeling of rest and freedom, I lay back in the corner and listened to Latimer's pleasantly drawling voice, as he described to me how he had accomplished his morning's coup.

It seems that, accompanied by Tommy and his own man Ellis, he had arrived at Queenborough by the early train. Instructions had already been wired through from London that the Sheppey police were to put themselves entirely at his disposal; and having commandeered a car, the three of them, together with our friend the sergeant, set off to the bungalow. They pulled up some little distance away and waited for Guthrie, Latimer's other a.s.sistant, who had been keeping an eye on the place during the night. He reported that McMurtrie and Savaroff and von Brunig had just put off in the launch, leaving the other two behind.

"I guessed they had gone to pay you a visit," explained Latimer drily, "and it seemed to me a favourable chance of doing a little calling on our own account."

The net result of that little call had been the bloodless capture of Hoffman and the other German spy, who had been surprised in the prosaic act of swallowing their breakfast.

Having been favoured by fortune so far, Latimer had promptly proceeded to make the best use of his opportunity. It struck him that, whatever might be the result of their visit to me, the other members of the party were pretty sure to come back to the bungalow. The idea of hiding behind the curtain at once suggested itself to him. It was just possible that in this way he might pick up some valuable information before he was discovered, while in any case it would give him the advantage of taking them utterly by surprise.

His first step had been to tie up the prisoners, and pack them off in the car to Queenborough police station with Guthrie and the sergeant as an escort. (I should have loved to have heard his conversation with Hoffman while the former operation was in progress!) He then carefully removed all inside and outside traces of the raid on the bungalow, and picked out a couple of convenient hiding-places in the garden, where Tommy and Ellis could he in ambush until they were wanted. A shot from his revolver or the smashing of the French window was to be the signal for their united entrance on the scene.

"Well, you know the end of the story as well as I do," he finished, nicking off the ash of his cigar. "Things could scarcely have turned out better, except for that unfortunate accident with McMurtrie."

He paused. "I wouldn't have shot him for the world," he added regretfully, "but he really left me no choice."

"He would have been hanged anyway," put in Tommy consolingly.

Latimer smiled. "I didn't mean to suggest that it was likely to keep me awake at night. I was only thinking that we might perhaps have got some useful information out of him."

"It seems to me," I said gratefully, "that we did."

Through the interminable suburbs and slums of South-East London we steamed slowly into London Bridge Station and drew up at the platform.

There was a taxi waiting almost opposite our carriage, and promptly securing the driver Latimer instructed him to take us "as quickly as possible" to No. 10 Downing Street.

The man carried out his order with almost alarming literalness, but Providence watched over us and we reached the Foreign Office without disaster. Favoured with a respectful salute from the liveried porter on duty, Latimer led the way into the hall.

We followed him down a short narrow pa.s.sage to another corridor, where he unlocked and opened a door on the left, ushering us into a small room comfortably fitted up as an office.

"This is my own private den," he said; "so no one will disturb you. I will go and see if Cas.e.m.e.nt has come. If so, he is probably upstairs with Lammersfield. I will give them my report, and then no doubt they will want to see you. You won't have to wait very long."

He nodded pleasantly and left the room, closing the door after him.

For all his quiet, almost lethargic manner, it was curious what an atmosphere of swiftness and decision he seemed to carry about with him.

I turned to Tommy.

"Where's Joyce?" I asked.

"She's at the flat," he announced. "She said she would wait there until she heard from us. I saw her last night, you know. I was having supper at Hatchett's with Latimer when she turned up with your letter.

She'd come on from his rooms."

"There are many women," I said softly, "but there is only one Joyce."

Tommy chuckled. "That's what Latimer thinks. After she left us--I was staying the night with him in Jermyn Street and we'd all three gone back there to talk it over--he said to me in that funny drawling way of his: 'You know, Morrison, that girl will be wasted, even on Lyndon.

She ought to be in the Secret Service.'"

I laughed. "I'm grateful to the Secret Service," I said, "but there are limits even to grat.i.tude."

For perhaps three-quarters of an hour we remained undisturbed, while Latimer was presumably presenting his report to the authorities. Every now and then we heard footsteps pa.s.s down the corridor, and on one occasion an electric bell went off with a sudden vicious energy that I should never have expected in a Government office. The time pa.s.sed quickly, for we had plenty to talk about; indeed, our only objection to waiting was the fact that we were both beginning to get infernally hungry, and it seemed likely to be some time yet before we should be able to get anything to eat.

At last there came a discreet knock at the door, and an elderly clean-shaven person with the manners of a retired butler appeared noiselessly upon the threshold. He bowed slightly to us both.

"Lord Lammersfield wishes to see you, gentlemen. If you will be good enough to follow me, I will conduct you to his presence."

We followed him along the corridor and up a rather dingy staircase, when he tapped gently at a door immediately facing us. "Come in,"