"You were kind enough to give me one of your cards," I reminded him.

"Why, yes, to be sure; so I did--so I did." Again he paused and gazed at me with a sort of incredulous amazement. "You must have nerves of steel, sir. Most men in such a situation would have been paralysed with terror."

The idea of Sir George paralysing anybody with terror struck me as so delightful that I almost burst out laughing, but by a great effort I just managed to restrain myself.

"As an escaped convict," I said, "one becomes used to rather desperate situations."

Lammersfield, the corner of whose mouth was twitching suspiciously, broke into the conversation.

"It was a remarkable coincidence," he said, "but you see how it confirms Cas.e.m.e.nt's story if any further confirmation were needed."

Sir George nodded. "Yes, yes," he said. "I suppose there can be no doubt about it. The proofs of it all seem beyond question." He turned to me. "Taking everything into consideration, Mr. Lyndon, you appear to have acted in a most creditable and patriotic manner. I understand that the moment you discovered the nature of the plot in which you were involved you placed yourself entirely at the disposal of the Secret Service. That is right, Mr. Latimer, is it not?"

Latimer stepped forward. "If Mr. Lyndon had chosen to do it, sir," he said, "he could have sold his invention to Germany and escaped with the money. At that time he had no proof to offer that he had been wrongly convicted. Rather than betray his country, however, he was prepared to return to prison and serve out his sentence."

As an accurate description of my att.i.tude in the matter it certainly left something to be desired, but it seemed to have a highly satisfactory effect upon Sir George. He took a step towards me, and gravely and rather pompously shook me by the hand.

"Sir," he said, "permit me to congratulate you both on your conduct and on the dramatic establishment of your innocence. It will be my pleasant duty as Home Secretary to see that every possible reparation is made to you for the great injustice that you have suffered."

Lammersfield, who had gone back to his seat at the table, again interrupted.

"You agree with me, don't you, Frinton, that, pending any steps you and the Prime Minister choose to take in the matter, Mr. Lyndon may consider himself a free man?"

Sir George seemed a trifle embarra.s.sed. "Well--er--to a certain extent, most decidedly. I have informed Scotland Yard that he has voluntarily surrendered himself to the Secret Service, so there will be no further attempt to carry out the arrest. I--I presume that Mr.

Cas.e.m.e.nt and Mr. Latimer will be officially responsible for him?"

The former gave a rea.s.suring nod. "Certainly, Sir George," he observed.

"I am entirely in your hands, sir," I put in. "There are one or two little things I wanted to do, but if you prefer that I should consider myself under arrest--"

"No, no, Mr. Lyndon," he interrupted; "there is no necessity for that--no necessity at all. Strictly speaking, of course, you are still a prisoner, but for the present it will perhaps be best to avoid any formal proceedings. I understand that both Lord Lammersfield and Mr.

Cas.e.m.e.nt consider it advisable to keep the whole matter as quiet as possible, at all events until the return of the Prime Minister. After that we must decide what steps it will be best to take."

"I am very much obliged to you," I said. "There is one question I should like to ask if I may."

He took off his spectacles and polished them with his pocket-handkerchief. "Well?" he observed encouragingly.

"I should like to know whether Savaroff's daughter is in custody--the girl who gave the police their information about me."

"Ah!" he said, with some satisfaction, "that is a point on which you all appear to have been misled. I have just enlightened Mr. Cas.e.m.e.nt in the matter. The information on which the police acted was not supplied by a girl." He paused. "It was given them by your cousin and late partner, Mr. George Marwood."

"What!" I almost shouted; and I heard Tommy indulge in a half-smothered exclamation which was not at all suited to our distinguished company.

Sir George, who was evidently pleased with our surprise, nodded his head.

"Mr. Marwood rang up Scotland Yard at half-past ten last night. He told them he had received an anonymous letter giving two addresses, at one of which you would probably be found. He also gave a full description of the alterations in your appearance."

I turned to Latimer. "I suppose it was Sonia," I said. "I never dreamed of her going to him, though."

"It was very natural," he replied in that unconcerned drawl of his.

"She knew that your cousin would do everything possible to get you under lock and key again, and at the same time she imagined she would avoid the risk of being arrested herself."

"Quite so, quite so," said Sir George, nodding his head sagely. "From all I can gather she seems to be a most dangerous young woman. I shall make a particular point of seeing that she is arrested."

His words came home to me with a sudden swift stab of pity and remorse. It was horrible to think of Sonia in jail--Sonia eating out her wild pa.s.sionate heart in the hideous slavery I knew so well. The thought of all that she had risked and suffered for my sake crowded back into my mind with overwhelming force. I took a step forward.

"Sir George," I said, "a moment ago you were good enough to say that the Government would try and make me some return for the injustice I have suffered."

He looked at me in obvious surprise. "Certainly," he said--"certainly.

I am convinced that they will take the most generous view of the circ.u.mstances."

"There is only one thing I ask," I said. "Except for this girl, Sonia Savaroff, the Germans would now be in possession of my invention. If the Government feel that they owe me anything, they can cancel the debt altogether by allowing her to go free."

Sir George raised his eyegla.s.s. "You ask this after she did her best to send you back to penal servitude?"

I nodded. "I am not sure," I said, "that I didn't thoroughly deserve it."

For a moment Sir George stared at me in a puzzled sort of fashion.

"Very well," he said; "I think it might be arranged. As you say, she was of considerable a.s.sistance to us, even if it was unintentionally.

That is a point in her favour--a distinct point."

"How about our friend Mr. Marwood?" put in Lammersfield pleasantly.

"Between perjury and selling Government secrets I suppose we have enough evidence to justify his arrest?"

"I think so," said Sir George, nodding his head solemnly. "Anyhow I have given instructions for it. In a case like this it is best to be on the safe side."

My heart sank at his words. Charming as it was to think of George in the affectionate clutch of a policeman, I could almost have wept at the idea of being robbed of my own little interview with him, to which I had been looking forward for so long. It was Lammersfield who broke in on my disappointment. "I should imagine," he said considerately, "that you two, as well as Latimer, must be half starving. I suppose you have had nothing to eat since breakfast."

Tommy rose to his feet with an alacrity that answered the question so far as he was concerned, and I acknowledged that a brief interval for refreshment would be by no means unwelcome.

"Well, I'm afraid I can't spare Latimer just yet," he said, "but you two go off and have a good lunch. Come back here again as soon as you've done. I will ring up the War Office and the Admiralty while you are away, and we will arrange for a couple of their men to meet us here, and then you can explain about your new explosive. I fancy you will find them quite an appreciative audience."

He pressed a bell by his side, and getting up from the table, accompanied us to the door, where I stopped for a moment to try and express my thanks both to him and Sir George.

"My dear Mr. Lyndon," he interrupted courteously, "you have been in prison for three years for a crime that you didn't commit, and in return for that you have done England a service that it is almost impossible to overrate. Under the circ.u.mstances even a Cabinet Minister may be excused a little common civility."

As he spoke there came a knock at the door, and in answer to his summons the impa.s.sive butler person appeared on the threshold.

"Show these gentlemen out, Simpson," he said, "and let me know directly they return." Then, shaking my hand in a friendly fashion, he added with a quizzical smile, "If you should happen to come across any mutual acquaintance of ours, perhaps you will be kind enough to convey my unofficial congratulations. I hope before long to have the privilege of offering them personally."

I promised to deliver his message, and, following our guide downstairs, we pa.s.sed out into the street.

"I like that chap," said Tommy. "He's got no silly side about him.

Joyce always said he was a good sort."

He stopped on the pavement, and with his usual serene disregard for the respectabilities proceeded to fill and light a huge briar pipe.

"What's the programme now?" he inquired. "I'm just dying for some grub."