How is this adventure to end

Dr. van Heerden expected many things and was prepared for contingencies beyond the imagination of the normally minded, but he was not prepared to find in Oliva Cresswell a pleasant travelling-companion. When a man takes a girl, against her will, from a pleasant suite at the best hotel in London, compels her at the peril of death to accompany him on a motor-car ride in the dead of the night, and when his offence is a duplication of one which had been committed less than a week before, he not unnaturally anticipates tears, supplications, or in the alternative a frigid and unapproachable silence.
To his amazement Oliva was extraordinarily cheerful and talkative and even amusing. He had kept Bridgers at the door of the car whilst he investigated the pawn-broking establishment of Messrs. Rosenblaum Bros., and had returned in triumph to discover that the girl who up to then had been taciturn and uncommunicative was in quite an amiable mood.
"I used to think," she said, "that motor-car abductions were the invention of sensational writers, but you seem to make a practice of it. You are not very original, Dr. van Heerden. I think I've told you that before."
He smiled in the darkness as the car sped smoothly through the deserted streets.
"I must plead guilty to being rather unoriginal," he said, "but I promise you that this little adventure shall not end as did the last."
"It can hardly do that," she laughed, "I can only be married once whilst Mr. Beale is alive."
"I forgot you were married," he said suddenly, then after a pause, "I suppose you will divorce him?"
"How is this adventure to end?" she demanded. "Are you going to maroon me on a desert island, or are you taking me to Germany?"
"How did you know I am trying to get to Germany?" he asked sharply.
"Oh, Mr. Beale thought so," she replied, in a tone of indifference, "he reckoned that he would catch you somewhere near the coast."
"He did, did he?" said the other calmly. "I shall deny him that pleasure. I don't intend taking you to Germany. Indeed, it is not my intention to detain you any longer than is necessary."
"For which I am truly grateful," she smiled, "but why detain me at all?"
"That is a stupid question to ask when I am sure you have no doubt in your mind as to why it is necessary to keep you close to me until I have finished my work. I think I told you some time ago," he went on, "that I had a great scheme. The other day you called me a Hun, by which I suppose you meant that I was a German. It is perfectly true that I am a German and I am a patriotic German. To me even in these days of his degradation the Kaiser is still little less than a god."
His voice quivered a little, and the girl was struck dumb with wonder that a man of such intelligence, of such a wide outlook, of such modernity, should hold to views so archaic.
"Your country ruined Germany. You have sucked us dry. To say that I hate England and hate America--for you Anglo-Saxons are one in your soulless covetousness--is to express my feelings mildly."
"But what is your scheme?" she asked.
"Briefly I will tell you, Miss Cresswell, that you may understand that to-night you accompany history and are a participant in world politics. America and England are going to pay. They are going to buy corn from my country at the price that Germany can fix. It will be a price," he cried, and did not attempt to conceal his joy, "which will ruin the Anglo-Saxon people more effectively than they ruined Germany."
"They are going to buy corn," he repeated, "at our price, corn which is stored in Germany."
"But what nonsense!" she said scornfully, "I don't know very much about harvests and things of that kind, but I know that most of the world's wheat comes from America and from Russia."
"The Russian wheat will be in German granaries," he said softly, "the American wheat--there will be no American wheat."