‘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.’