The journalist from Kansas City was a man of action. He wasted no words in introducing himself or unfolding his plan of campaign. ‘You’ve got to follow me, mister, and not deviate one inch from my tracks. The explaining part will come later. There’s big business in this shack tonight.’ He unlocked the little door with scarcely a sound, slid the crust of snow from his boots, and preceded me into a passage as black as a cellar. The door swung smoothly behind us, and after the sharp out-of-doors the air smelt stuffy as the inside of a safe.

A hand reached back to make sure that I followed. We appeared to be in a flagged passage under the main level of the house. My hobnailed boots slipped on the floor, and I steadied myself on the wall, which seemed to be of undressed stone. Mr Donne moved softly and assuredly, for he was better shod for the job than me, and his guiding hand came back constantly to make sure of my whereabouts.

I remember that I felt just as I had felt when on that August night I had explored the crevice of the Coolin — the same sense that something queer was going to happen, the same recklessness and contentment. Moving a foot at a time with immense care, we came to a right-hand turning. Two shallow steps led us to another passage, and then my groping hands struck a blind wall. The American was beside me, and his mouth was close to my ear.

‘Got to crawl now,’ he whispered. ‘You lead, mister, while I shed this coat of mine. Eight feet on your stomach and then upright.’

I wriggled through a low tunnel, broad enough to take three men abreast, but not two feet high. Half-way through I felt suffocated, for I never liked holes, and I had a momentary anxiety as to what we were after in this cellar pilgrimage. Presently I smelt free air and got on to my knees.

‘Right, mister?’ came a whisper from behind. My companion seemed to be waiting till I was through before he followed.

‘Right,’ I answered, and very carefully rose to my feet.

Then something happened behind me. There was a jar and a bump as if the roof of the tunnel had subsided. I turned sharply and groped at the mouth. I stuck my leg down and found a block.

‘Donne,’ I said, as loud as I dared, ‘are you hurt? Where are you?’

But no answer came.

Even then I thought only of an accident. Something had miscarried, and I was cut off in the cellars of an unfriendly house away from the man who knew the road and had a plan in his head. I was not so much frightened as exasperated. I turned from the tunnel-mouth and groped into the darkness before me. I might as well prospect the kind of prison into which I had blundered.

I took three steps — no more. My feet seemed suddenly to go from me and fly upward. So sudden was it that I fell heavy and dead like a log, and my head struck the floor with a crash that for a moment knocked me senseless. I was conscious of something falling on me and of an intolerable pressure on my chest. I struggled for breath, and found my arms and legs pinned and my whole body in a kind of wooden vice. I was sick with concussion, and could do nothing but gasp and choke down my nausea. The cut in the back of my head was bleeding freely and that helped to clear my wits, but I lay for a minute or two incapable of thought. I shut my eyes tight, as a man does when he is fighting with a swoon.

When I opened them there was light. It came from the left side of the room, the broad glare of a strong electric torch. I watched it stupidly, but it gave me the fillip needed to pick up the threads. I remembered the tunnel now and the Kansas journalist. Then behind the light I saw a face which pulled my flickering senses out of the mire.

I saw the heavy ulster and the cap, which I had realized, though I had not seen, outside in the dark laurels. They belonged to the journalist, Clarence Donne, the trusted emissary of Blenkiron. But I saw his face now, and it was that face which I had boasted to Bullivant I could never mistake again upon earth. I did not mistake it now, and I remember I had a faint satisfaction that I had made good my word. I had not mistaken it, for I had not had the chance to look at it till this moment. I saw with acid clearness the common denominator of all its disguises — the young man who lisped in the seaside villa, the stout philanthropist of Biggleswick, the pulpy panic-stricken creature of the Tube station, the trim French staff officer of the Picardy chateau . . . I saw more, for I saw it beyond the need of disguise. I was looking at von Schwabing, the exile, who had done more for Germany than any army commander . . . Mary’s words came back to me —‘the most dangerous man in the world’ . . . I was not afraid, or broken-hearted at failure, or angry — not yet, for I was too dazed and awestruck. I looked at him as one might look at some cataclysm of nature which had destroyed a continent.

The face was smiling.

‘I am happy to offer you hospitality at last,’ it said.

I pulled my wits farther out of the mud to attend to him. The cross-bar on my chest pressed less hard and I breathed better. But when I tried to speak, the words would not come.

‘We are old friends,’ he went on. ‘We have known each other quite intimately for four years, which is a long time in war. I have been interested in you, for you have a kind of crude intelligence, and you have compelled me to take you seriously. If you were cleverer you would appreciate the compliment. But you were fool enough to think you could beat me, and for that you must be punished. Oh no, don’t flatter yourself you were ever dangerous. You were only troublesome and presumptuous like a mosquito one flicks off one’s sleeve.’

He was leaning against the side of a heavy closed door. He lit a cigar from a little gold tinder box and regarded me with amused eyes.

‘You will have time for reflection, so I propose to enlighten you a little. You are an observer of little things. So? Did you ever see a cat with a mouse? The mouse runs about and hides and manoeuvres and thinks it is playing its own game. But at any moment the cat can stretch out its paw and put an end to it. You are the mouse, my poor General — for I believe you are one of those funny amateurs that the English call Generals. At any moment during the last nine months I could have put an end to you with a nod.’

My nausea had stopped and I could understand what he said, though I had still no power to reply.

‘Let me explain,’ he went on. ‘I watched with amusement your gambols at Biggleswick. My eyes followed you when you went to the Clyde and in your stupid twistings in Scotland. I gave you rope, because you were futile, and I had graver things to attend to. I allowed you to amuse yourself at your British Front with childish investigations and to play the fool in Paris. I have followed every step of your course in Switzerland, and I have helped your idiotic Yankee friend to plot against myself. While you thought you were drawing your net around me, I was drawing mine around you. I assure you, it has been a charming relaxation from serious business.’

I knew the man was lying. Some part was true, for he had clearly fooled Blenkiron; but I remembered the hurried flight from Biggleswick and Eaucourt Sainte–Anne when the game was certainly against him. He had me at his mercy, and was wreaking his vanity on me. That made him smaller in my eyes, and my first awe began to pass.

‘I never cherish rancour, you know,’ he said. ‘In my business it is silly to be angry, for it wastes energy. But I do not tolerate insolence, my dear General. And my country has the habit of doing justice on her enemies. It may interest you to know that the end is not far off. Germany has faced a jealous world in arms and she is about to be justified of her great courage. She has broken up bit by bit the clumsy organization of her opponents. Where is Russia today, the steam-roller that was to crush us? Where is the poor dupe Rumania? Where is the strength of Italy, who was once to do wonders for what she called Liberty? Broken, all of them. I have played my part in that work and now the need is past. My country with free hands is about to turn upon your armed rabble in the West and drive it into the Atlantic. Then we shall deal with the ragged remains of France and the handful of noisy Americans. By midsummer there will be peace dictated by triumphant Germany.’

‘By God, there won’t!’ I had found my voice at last.

‘By God, there will,’ he said pleasantly. ‘It is what you call a mathematical certainty. You will no doubt die bravely, like the savage tribes that your Empire used to conquer. But we have the greater discipline and the stronger spirit and the bigger brain. Stupidity is always punished in the end, and you are a stupid race. Do not think that your kinsmen across the Atlantic will save you. They are a commercial people and by no means sure of themselves. When they have blustered a little they will see reason and find some means of saving their faces. Their comic President will make a speech or two and write us a solemn note, and we will reply with the serious rhetoric which he loves, and then we shall kiss and be friends. You know in your heart that it will be so.’

A great apathy seemed to settle on me. This bragging did not make me angry, and I had no longer any wish to contradict him. It may have been the result of the fall, but my mind had stopped working. I heard his voice as one listens casually to the ticking of a clock.

‘I will tell you more,’ he was saying. ‘This is the evening of the 18th day of March. Your generals in France expect an attack, but they are not sure where it will come. Some think it may be in Champagne or on the Aisne, some at Ypres, some at St Quentin. Well, my dear General, you alone will I take into our confidence. On the morning of the 21st, three days from now, we attack the right wing of the British Army. In two days we shall be in Amiens. On the third we shall have driven a wedge as far as the sea. Then in a week or so we shall have rolled up your army from the right, and presently we shall be in Boulogne and Calais. After that Paris falls, and then Peace.’

I made no answer. The word ‘Amiens’ recalled Mary, and I was trying to remember the day in January when she and I had motored south from that pleasant city.

‘Why do I tell you these things? Your intelligence, for you are not altogether foolish, will have supplied the answer. It is because your life is over. As your Shakespeare says, the rest is silence . . . No, I am not going to kill you. That would be crude, and I hate crudities. I am going now on a little journey, and when I return in twenty-four hours’ time you will be my companion. You are going to visit Germany, my dear General.’

That woke me to attention, and he noticed it, for he went on with gusto.

‘You have heard of the Untergrundbahn? No? And you boast of an Intelligence service! Yet your ignorance is shared by the whole of your General Staff. It is a little organization of my own. By it we can take unwilling and dangerous people inside our frontier to be dealt with as we please. Some have gone from England and many from France. Officially I believe they are recorded as “missing”, but they did not go astray on any battle-field. They have been gathered from their homes or from hotels or offices or even the busy streets. I will not conceal from you that the service of our Underground Railway is a little irregular from England and France. But from Switzerland it is smooth as a trunk line. There are unwatched spots on the frontier, and we have our agents among the frontier guards, and we have no difficulty about passes. It is a pretty device, and you will soon be privileged to observe its working . . . In Germany I cannot promise you comfort, but I do not think your life will be dull.’

As he spoke these words, his urbane smile changed to a grin of impish malevolence. Even through my torpor I felt the venom and I shivered.

‘When I return I shall have another companion.’ His voice was honeyed again. ‘There is a certain pretty lady who was to be the bait to entice me into Italy. It was so? Well, I have fallen to the bait. I have arranged that she shall meet me this very night at a mountain inn on the Italian side. I have arranged, too, that she shall be alone. She is an innocent child, and I do not think that she has been more than a tool in the clumsy hands of your friends. She will come with me when I ask her, and we shall be a merry party in the Underground Express.’

My apathy vanished, and every nerve in me was alive at the words.

‘You cur!’ I cried. ‘She loathes the sight of you. She wouldn’t touch you with the end of a barge-pole.’

He flicked the ash from his cigar. ‘I think you are mistaken. I am very persuasive, and I d............